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Learning Linux : Lesson 5 GRUB Bootloader
 
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More videos like this at http://www.theurbanpenguin.com This week we are are 5 weeks into the schedule and we take a look at the GRUB bootloader, or the Grand Unified Bootloader. Using openSUSE the configuration for this is /boot/grub/menu.lst. The bootloader allows us to select the OS and any kernel options. We can add entries into the menu and, should we wish, delete entries. We will also look at securing the GRUB menu with a password, this way you can only select from menu items and not append additional kernel options. The risk of this is highlighted by booting with the init=/bin/bash; this gives us root access with need of a password. Adding the grub password and encrypting it with grub-md5-crypt will prevent this.
Views: 46767 theurbanpenguin
PCI Passthrough | System Configuration | Part 1
 
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PCI Passthrough Explained! I go over the System Configuration with verification steps in this series of videos. This video goes over enabling IOMMU, Changing kernel for VFIO, and Whitelisting QEMU for your system. Timestamps: 0:30 Overview and Explaining Steps with distribution and hardware differences 5:00 Step 1- Enabling IOMMU 6:37 Step 2 - Finding Device IDs and creating VFIO Passthrough kernel 12:28 Step 3 - Apparmor Setup My Recommend Graphics Card AMD RX 570 - https://amzn.to/2Fn6kfA Cheat Sheet *NVIDIA Disclaimer*: Extra steps needed when VM is created in Part 2 *Intel Disclaimer*: Steps shown are on an AMD CPU, make sure you sub out amd for intel in Part 1. Add the following to /etc/default/grub Check for line --- GRUB_CMDLINE_LINUX_DEFAULT="quiet" Add -- iommu=1 amd_iommu=on (Sub amd to intel depending on CPU) $ sudo update-grub Reboot! Verify IOMMU is enabled $ dmesg | grep IOMMU Lets Find the Card to passthrough $ lspci -nn | grep -iP "VGA|audio" Setup VFIO with Device numbers/id from above VIDEO AND AUDIO! $ sudo nano /etc/initramfs-tools/modules Add the following softdep amdgpu pre: vfio vfio_pci vfio vfio_iommu_type1 vfio_virqfd options vfio_pci ids=1002:67df,1002:aaf0 vfio_pci ids=1002:67df,1002:aaf0 vfio_pci amdgpu $ sudo nano /etc/modules Add the following: vfio vfio_iommu_type1 vfio_pci ids=1002:67df,1002:aaf0 $ sudo nano /etc/modprobe.d/amdgpu.conf softdep amdgpu pre: vfio vfio_pci $ sudo nano /etc/modprobe.d/vfio_pci.conf options vfio_pci ids=1002:67df,1002:aaf0 lspci -vnn | grep -iP "vga|amdgpu|nvidia|nouveau|vfio-pci" Avoid BSODs on New Windows 10 Installs $ sudo nano /etc/modprobe.d/kvm.conf options kvm ignore_msrs=1 options kvm report_ignored_msrs=0 Fix Apparmor restrictions $ sudo nano /etc/apparmor.d/abstractions/libvirt-qemu --Modify-- # for usb access /dev/bus/usb/** rw, /etc/udev/udev.conf r, /sys/bus/ r, /sys/class/ r, /run/udev/data/* rw, --Append-- # Looking Glass /dev/shm/looking-glass rw, $ sudo systemctl restart apparmor Where can I find you!? - Patreon ➜ https://www.patreon.com/christitustech - Official Site ➜ https://www.christitus.com - Reddit ➜ https://www.reddit.com/r/ChrisTitusTech/ - Twitter ➜ https://twitter.com/christitustech - Twitch (Live Streams) ➜ https://www.twitch.tv/christitustech ===My Recommend PC Hardware=== https://www.christitus.com/recommendations/ ===My Recommended Linux Books=== https://www.christitus.com/recommendations/#books ===My Current YouTube Gear=== https://www.christitus.com/recommendations/#youtube DISCLAIMER: This video and description contain affiliate links, which means that if you click on one of the product links, I’ll receive a small commission. This help supports the channel and allows us to continue to make videos like this. Thank you for your support!
Views: 3888 Chris Titus Tech
Linux Kernel on Bsquare Maui - 2nd append - got framebuffer working!
 
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Second append, this time with working framebuffer. Running on kernel 2.6.24-hpc. Sorry for low quality... recorded using a calculator. Seriously.
Views: 174 Kajetan Krykwiński
How to add Cisco ASA 8.4(2) Firewall in GNS3 2.1.0
 
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In this video I am going to show you how to add / install cisco ASA 8.4(2) Firewall in GNS3 latest version 2.1.0. Download initrd and kernal here! https://drive.google.com/drive/folders/0BxGGwKJEWVB0dzd5aFMzTjRNcDg Kernel command line: -append ide_generic.probe_mask=0x01 ide_core.chs=0.0:980,16,32 auto nousb console=ttyS0,9600 bigphysarea=65536 no-hlt QEMU Options: -vnc none -vga none -m 1024 -icount auto -hdachs 980,16,32 Once the ASA is up, enter enable and then enter the following to activate features (these activation keys might take a long time to apply – meaning ~5-15 minutes, so be patient): activation-key 0x4a3ec071 0x0d86fbf6 0x7cb1bc48 0x8b48b8b0 0xf317c0b5 activation-key 0xb23bcf4a 0x1c713b4f 0x7d53bcbc 0xc4f8d09c 0x0e24c6b6 If you like the video, press the Like button. If you think that this video needs improvements, leave a comment below. If you are interested in my channel, subscribe to be notified if a new video is released. -~-~~-~~~-~~-~- Please watch: "Network Address Translations on Cisco Routers [Urdu / Hindi]" https://www.youtube.com/watch?v=rKn-p0EOjKQ -~-~~-~~~-~~-~-
Views: 11630 IT Lab
Howto Change Linux Boot Options and Splash Screen
 
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Don't like how ugly your PC looks when you dual boot? Customize how your computer boots with Grub 2 - ||Join the chat: http://on.fb.me/follownix || In this tutorial I show you the basic ways to configure your bootloader. Lots of things have changed since the upgrade from the original Grub, so check out this week's episode of OS.ALT to learn more about how to make your boot menu boot-a-licious! Fight for the users in our Discord: https://discordapp.com/invite/CKYwgxA
Views: 158262 Nixie Pixel
Change GRUB Default Bootup Option - Linux CLI
 
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commands used: # refresh our grub just to be sure sudo grub-mkconfig -o /boot/grub/grub.cfg # find out which number we need to use. # remember to minus one since grub counts starting at zero. sudo grep "menuentry '" /boot/grub/grub.cfg | less -N q = quit # edit grub and put in the number you want to boot into sudo nano /etc/default/grub Ctrl+o, Enter, Ctrl+x = save changes # update our changes sudo grub-mkconfig -o /boot/grub/grub.cfg #check kernel if you wish uname -a inxi -S
Views: 40316 gotbletu
Configuring Cisco ASA 8.4.2 on GNS3 1.1
 
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This video describe how to configure an ASA 8.4.2 on QEMU. - Please don't ask for files or links, I won't provide either - Question, you can follow me on twitter @itech_live. - This is a working configuration, you need to follow the video. Commands use on this video qemu-img.exe create FLASH 256M kernel options: Kernel cmd line: -append ide_generic.probe_mask=0x01 ide_core.chs=0.0:980,16,32 auto nousb console=ttyS0,9600 bigphysarea=65536 ide1=noprobe no-hlt qemu options:-vnc none -vga none -m 1024 -icount auto -hdachs 980,16,32 ASA Commands #copy running-config startup-config #copy startup-config flash: #reload when make the initial change #copy running-config startup-config #reload After that you can turn off and on the ASA and the configuration will stay in the flash Don't use "wr" to save it won't work
Views: 26602 Beyond Network
Arch Linux on SSD with encryption (Tutorial)
 
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This is my first tutorial video. I try to cover a basic Arch installation as succinctly as possible while going over encryption. Hopefully it's helpful! Some additional notes: 1) If you want to enable discard/TRIM functions on your encrypted/de-crypted partition, you will need to append ":allow-discards" to your cryptdevice line in your bootloader configuration file (ie: cryptdevice=/dev/sda2:root:allow-discards). Thereafter, add the appropriate mount options to your fstab file as they apply to the filesystem you've chosen, or just periodically run fstrim. 2) I use the Samsung 850 Pro and have had problems with the drive freezing and being reset while in use. I haven't seen this problem with the EVO line. If you are experiencing this problem, append "libata.force=noncq" to your kernel parameters in your bootloader's configuration file. 3) "Noop" is purportedly an ideal I/O scheduler for SSDs. If you don't want to take the time to compile a kernel, you can simply append "elevator=noop" to your kernel parameters. This is what my "append" line looks like, to explain the above: cryptdevice=/dev/sda2:root:allow-discards root=/dev/mapper/root rw quiet vga=895 elevator=noop libata.force=noncq
Views: 25059 MirrorMatter
How to create a KVM gaming virtual machine in under 30 minutes!
 
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Hey everyone, I finally got around to assembling a rough guide on beginning to work on your own gaming virtual machine on both desktops and laptops in under 30 minutes! This guide is a bit more focused on Arch and Arch-based distros and focuses on Nvidia cards (note: Error 43), but with a few package manager changes here and there it'll work on all modern distros and cards! This is my first time making a tutorial video on Linux, so hopefully it helps all of you out! I forgot to bring this up in the beginning, but you NEED a VT-d and VT-x compatible CPU before doing this, and you need to enable both settings in your BIOS beforehand. For example, an i7-3632QM can't do it (rPGA CPUs are weirdly limited like that), but an i7-3720QM can. The reason VT-d is so important is that it's built into the CPU to allow devices to be passed through. There may be possible software alternatives, but they're rare, slow, usually not Windows friendly, and just generally not worth it. Also, you'll need to make sure the primary card being used on your OS isn't the one you want to use in the VM. Tips and tricks from my video: After installing libvirtd, dnsmasq and ebtables, enable them as a service with your system's respective service manage (ie; for systemd users, sudo systemctl enable libvirtd dnsmasq ebtables) For "/etc/libvirt/qemu.conf", add: nvram = [ "/usr/share/ovmf/x64/OVMF_CODE.fd:/usr/share/ovmf/x64/OVMF_VARS.fd" ] Command to find your lspci ID = "lspci -nnk" (it'll be the value that starts with 10de:, usually.) Intel Kernel Parameters = "intel_iommu=on vfio-pci.ids=VALUEHERE" (under options in systemd-boot, under GRUB_CMDLINE_LINUX_DEFAULT in GRUB) AMD Kernel Parameters = "iommu=pt vfio-pci.ids=VALUEHERE" (under options in systemd-boot, under GRUB_CMDLINE_LINUX_DEFAULT in GRUB) If you're not sure how to modify your kernel parameters, do as follows: GRUB: Go to Terminal, type "sudo nano /etc/default/grub", type your password, then look for the field that says GRUB_CMDLINE_LINUX_DEFAULT, and at the end of that before the last bracket, add the commands from above with no quotation marks. Then upgrade GRUB either via the default "sudo update-grub" on Debian-based distros, or the default "sudo grub-mkconfig -o /boot/grub/grub.cfg" on Arch-based distros. systemd-boot: Go to Terminal, type "sudo nano /boot/loader/entries/distro.conf", distro being whatever distro entry you have installed, then appending the kernel parameters to the end of "options". For systems with only one Nvidia/Radeon GPU, you'll want to blacklist it in /etc/modprobe.d/blacklist.conf, as follows: blacklist nouveau blacklist nvidia # or if you're an AMD user # blacklist radeon Then save and you're all golden. Note that you'll have to remove these if you want to use your card within Linux. If you have any questions or comments, please leave them down below and I'll get back to you ASAP. My apologies for the weird flickering on the right side of the screen, it wasn't an issue while I was recording, so I don't know where it came from. List of resources that helped me get to this point, and can hopefully help you! Passthrough Post - https://passthroughpo.st/quick-dirty-arch-passthrough-guide/ Virsh Patcher - https://github.com/PassthroughPOST/virsh-patcher ArchWiki - https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF Passthrough Post Evdev Passthrough (for sharing a single keyboard and mouse between host and VM) - https://passthroughpo.st/using-evdev-passthrough-seamless-vm-input/ Looking Glass, a KVM Relay host/client software that allows you to use only one display on both machines via shared memory between the two operating systems. - https://looking-glass.hostfission.com/ VFIO Reddit - https://reddit.com/vfio/ eGPU Reddit - https://reddit.com/egpu
Views: 985 Raven Repair Co.
Linux Boot Process: Grub, initrd, explained.
 
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Learn the basics of Linux boot process: * BIOS * GRUB / GRUB2 * LILO * initrd (Initial RAM disk) * /boot directory in Linux * Linux kernel and kernel naming * The dmesg command and log file If you enjoyed this video, then you'll love our Linux Administration Bootcamp course: https://courses.linuxtrainingacademy.com/course/linux-admin-bootcamp/
How to SOLVE BOOT PROBLEMS in Ubuntu (kernel panic, noapic, acpi=off etc)
 
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In this video i show how to solve boot problems like "kernel panic" with "noapic" and other boot options in Ubuntu. Watch all the video, it covers booting from live cd, editing boot line for first boot and making the changes permanent! Enjoy!
Views: 186307 yooyoomine
ASA Firewall - Basic Lab config on GNS3
 
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This is the basic lab for the Firewall exam of CCNP Security Qemu Options: -vnc none -vga none -m 1024 -icount auto -hdachs 980,16,32 Kernel cmd line: -append ide_generic.probe_mask=0x01 ide_core.chs=0.0:980,16,32 auto nousb console=ttyS0,9600 bigphysarea=65536
Views: 90619 CJTutorialSpace
[BUG] SysLinux & WDS
 
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Default : DEFAULT vesamenu.c32 PROMPT 0 MENU DEFAULT MENU COLOR TITLE 1 #FFFFFF #00000000 MENU BACKGROUND AB.jpg MENU TITLE WDS CROSS-COMPATIBLE SERVER WINDOWS / LINUX ALPHA 2.7 LABEL WDS MENU LABEL ^1) Serveur WDS timeout 80          TOTALTIMEOUT 9000     KERNEL pxeboot.0 LABEL Tools MENU LABEL ^2) Boite a Outils KERNEL vesamenu.c32 APPEND pxelinux.cfg/graphics.conf pxelinux.cfg/tools.menu LABEL Debian menu label ^3) Debian 8.8.0 kernel Linux/Debian/install.amd/vmlinuz append auto=true priority=critical vga=788 initrd=Linux\Debian\install.amd\initrd.gz preseed/url=tftp://10.0.0.1/Linux/Debian/pool/main/p/preseed/network-preseed_1.66_all.udeb label CentOS menu label ^4) CentOS 7 kernel Linux/CentOS/images/pxeboot/vmlinuz append initrd=Linux/CentOS/images/pxeboot/initrd.img method=http://10.0.0.1/Linux/CentOS devfs=nomount ------------------------------------------------------------------- Tools.menu : MENU TITLE Boite a Outils BETA 5.1 PROMPT 0 MENU DEFAULT MENU COLOR TITLE 1 #FFFFFF #00000000 MENU BACKGROUND AB.jpg LABEL Clonezilla Live MENU LABEL ^1) Clonezilla Live kernel \Linux\Clonezilla\vmlinuz append initrd=\Linux\Clonezilla\initrd.img boot=live live-config noswap nolocales edd=on nomodeset ocs_live_run="ocs-live-general" ocs_live_extra_param="" ocs_live_keymap="" ocs_live_batch="no" ocs_lang="" vga=788 nosplash fetch=http://10.0.0.1:81/RemoteInstall/Boot/x64/Linux/Clonezilla/filesystem.squashfs TEXT HELP Clonezilla Live version: 2.5.0-25.amd64.PXE ENDTEXT LABEL gparted MENU LABEL ^2) GParted Live kernel Linux/GPparted/live/vmlinuz append initrd=Linux/GParted/live/initrd.img boot=live live-config noswap nolocales edd=on nomodeset ocs_live_run="ocs-live-general" ocs_live_extra_param="" ocs_live_keymap="" ocs_live_batch="no" fetch=http://10.0.0.1:81/RemoteInstall/Boot/x64/Linux/GParted/live/filesystem.squashfs TEXT HELP GParted live version: 0.28.1-1.amd64.PXE ENDTEXT LABEL Falcon MENU label ^3) Falcon 4 Live KERNEL http://10.0.0.1:81/RemoteInstall/Boot/x64/Linux/PXELinux/memdisk INITRD http://10.0.0.1:81/RemoteInstall/Boot/x64/Linux/F4UBCD.iso APPEND iso raw TEXT HELP Falcon 4.61.amd64.PXE ENDTEXT LABEL Main Menu MENU LABEL ^4) Menu Principal KERNEL vesamenu.c32 APPEND pxelinux.cfg/default
Views: 657 Aristide Bergès
Erase process has failed. Click done to continue. Disk Utility Error FIX | Mac
 
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Disk Utility Error Message when formatting in MacBook Pro, iMac, Mac mini, Mac Pro, MacBook Air. There are 2 ways to really fix this problem. CODE you need for Terminal: Step 1: diskutil list Step 2: diskutil unmountDisk force
Views: 16482 Tech & Design
HOWTO Install SteamOS On An Old PC (No UEFI Boot)
 
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http://www/weeklygamingrecap.com *READ EVERYTHING BELOW BEFORE STARTING ANYTHING* Hey YouTube Nick here from Weekly Gaming Recap walking you through how to install SteamOS on an old PC (legacy hardware) that won't boot from your USB drive using Valves instructions. Usually this means you computer doesn't support UEFI or there might be some other problem going on. Right now this is all beta and the only video cards supported are NVIDIA. Comment/Questions/Thoughts? Let us know in the comments below and if you want to see more of these type of HOWTO's speak up! NOTE We cannot be held responsible if you lose your data, blow up your computer, etc, etc This is all very beta so don't say we didn't warn you. Also DO NOT TRY TO BOOT off this USB key on any computer you don't want to be WIPED OUT. The process is automatic and there are no options to stop it once it starts. --------------------------------------------------------------------------- Big shout out to FrostyCoolSlug over on Reddit for putting these instructions together: http://www.reddit.com/r/SteamOS/comments/1su4t1/uefi_requirement_with_steamos/ Step 1: Download syslinux from Here https://www.kernel.org/pub/linux/utils/boot/syslinux/syslinux-6.02.zip Download SteamOS from Here http://repo.steampowered.com/download/SteamOSInstaller.zip Step 2: Download the following two Grub packages* and place them in Z:\grub (you may need to create it) http://www.l4d3.org/grub-pc_1.99-27+deb7u1+steamos3+bsos1_amd64.deb http://www.l4d3.org/grub-pc-bin_1.99-27+deb7u1+steamos3+bsos1_amd64.deb Step 2: Extract the SteamOSInstaller.zip file to the root of your USB drive Step 3: In the root of your USB drive, create a new folder called syslinux Step 4: From the downloaded syslinux zip file, extract bios/win32 and bios/mbr into z:\syslinux\ Step 4: Open a Command Prompt as Administrator and run MAKE SURE YOU CORRECT THE DRIVE LETTER!: Z:\syslinux\win32\syslinux.exe --install --mbr --active Z: Step 5: Create the file Z:\syslinux.cfg and put in the following: DEFAULT linux TIMEOUT 50 LABEL linux kernel install.amd/vmlinuz append initrd=install.amd/gtk/initrd.gz preseed/file=/cdrom/default.preseed DEBCONF_DEBUG=developer desktop=steamos auto=true priority=critical video=vesa:ywrap,mtrr vga=788 -- quiet -=Remember DO NOT TRY TO BOOT off this USB key on any computer you don't want to be WIPED OUT. The process is automatic and there are no options to stop it once it starts.=- Step 6: Insert the USB drive into the target machine and boot, the installer should run. Step 7: The installer will FAIL when attempting to install grub, as grub-pc is missing, hold Ctrl+Alt and Hit F2 to drop into a shell, hit Enter to activate it. Step 8: Type the following and when prompted, do not select any drives, just hit OK and then 'Yes': chroot /target /bin/bash apt-get install grub-common grub2-common dpkg -i /media/cdrom/grub/grub-pc-bin_1.99-27+deb7u1+steamos3+bsos1_amd64.deb dpkg -i /media/cdrom/grub/grub-pc_1.99-27+deb7u1+steamos3+bsos1_amd64.deb Step 9: Once that's complete, Hold Ctrl+Alt then hit F5 to return to the UI Step 10: Hit 'Continue' to try grub again, this time it should run properly, say 'Yes' to installing to the MBR and the installation will complete. Step 11: Once installation is complete, follow the rest of the guide Here http://steamcommunity.com/groups/steamuniverse/discussions/1/648814395741989999/ * Note that the grub packages are hosted by me, they are simply the standard debian builds with the DEBIAN/control file edited to repair dependency problems, and re-versioned to reflect their SteamOS usefulness. ** Note2 When you get to the desktop in the terminal type: /usr/bin/steam To launch Steam and accept the EULA We've also posted the directions at our website here: http://www.weeklygamingrecap.com/?p=19827
Views: 42875 weeklygamingrecap
Windows Kernel Programming Tutorial 2 - Setting up Environment - Part 2
 
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In this tutorial, we will set up windbg for kernel debugging, and be sure to turn on closed captions for detailed explanation. Symbol path: SRV*c:\symbols* http://msdl.microsoft.com/download/symbols (change sy... to symbols)
Views: 5569 Programming LoL
Install ASA 8.42 in GNS3
 
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Install ASA 8.42 in GNS3 1. Prepare - WIN72 : A machine running Windows 7, IP 10.0.0.72 - Software and files : GNS3, tftpd32, java , images of ASA 8.42 (asa842-initrd, asa842-vmlinuz), asdm-649.bin 2. Step by step : Install ASA 8.42 in GNS3 - WIN72 : Install and configure ASA 8.42 + Install a loopback adapter named LB (IP 10.0.0.75) : + Start - Control Panel - Hardware and Sound - Device Manager - Right-click WIN72 - Add legacy hardware - Choose "Install the hardware that I manually select from a list (Advanced)" - Choose "Network adapters" - Manufacturer : Microsoft, Network Adapter : Microsoft Loopback Adapter - Next to Finish + Install java, GNS3 + GNS3 - Edit - Preferences... - Quemu - ASA tab : + Identifier : ASA, RAM : 1024 MiB + Qemu Options : -vnc none -vga none -m 1024 -icount auto -hdachs 980,16,32 + Initrd : browse to local of file asa842-initrd, Kernel : browse to local of file asa842-vmlinuz + Kernel cmd line : -append ide_generic.probe_mask=0x01 ide_core.chs=0.0:980,16,32 auto nousb console=ttyS0,9600 bigphysarea=65536 === Save - OK + Drag an ASA firewall, a Ethernet switch, a Cloud and connect them + Start ASA firewall - Console, type : enable - Enter - # configure terminal - (config)# interface gigabitEthernet 0 : ip address 10.0.0.100 255.255.255.0, nameif management, no shut, ping 10.0.0.75 - OK + Double-click tftpd32 - Browse to local of file asdm-649.bin - show Dir - display asdm-649.bin - OK + Start - cmd - ping 10.0.0.100 === OK + Console of ASA - exit to # - #copy tftp flash: , host : 10.0.0.75, Source filename : asdm-649.bin - Enter - # configure terminal - (config)# asdm image flash:adsm-649.bin, http server enable, http 10.0.0.75 255.255.255.255 management, username cisco password cisco privilede 15 + Click Internet Explorer - https://10.0.0.100 - Continue to this website (not recommended). - Install ASDM Launcher - Enter username and password - Run and next to Install - Device IP Address / Name : 10.0.0.100, Enter username and password === OK
Views: 448 microsoft lab
ASA firewall configuration on GNS3
 
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##### Configuration on GNS3 ####### Download asa842-initrd.gz and asa842-vmlinuz file from http://www.mediafire.com/download.php?ssadit26tl3llms RAM: 1024 MiB Number of NICs: 6 Qemu options: -m 1024 -icount auto -hdachs 980,16,32 Initrd: /home/niraj/GNS3/Images/asa842-initrd.gz (path of initrd image) Kernel: /home/niraj/GNS3/Images/asa842-vmlinuz (path of kernel image) Kernel cmd line: -append ide_generic.probe_mask=0x01 ide_core.chs=0.0:980,16,32 auto nousb console=ttyS0,9600 bigphysarea=65536
Views: 7360 Techxpert Infotech
Shell Scripting Tutorial-20: More On Positional Parameters
 
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In this tutorial we'll discuss positional parameters in greater detail, we'll also check out the 'set' command and see how it can help us assign values to our positional parameters.
Views: 94165 The Bad Tutorials
Kernel Compile + AMD Ryzen Threadripper First uhm half?  video
 
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Linux Vanilla Kernel Compilation on AMD Ryzen Threadripper 1950x Notes: These are the Steps you need and its for AMD Ryzen based System only. sudo apt-get install git build-essential kernel-package fakeroot libncurses5-dev libssl-dev ccache sudo apt-get install fakeroot build-essential crash kexec-tools makedumpfile kernel-wedge sudo apt-get build-dep linux sudo apt-get install git-core libncurses5 libncurses5-dev libelf-dev asciidoc binutils-dev git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git cd linux apt-get source linux-image-$(uname -r) apt-get source linux-image-`uname -r` apt-get build-dep linux-image-$(uname -r) git checkout COMMIT cp /boot/config-`uname -r` .config make clean debian/rules updateconfigs chmod -R u+x debian/scripts/* fakeroot debian/rules clean fakeroot debian/rules binary make-kpkg -j32 --rootcmd fakeroot --initrd --append-to-version=-threadripper kernel-image kernel-headers kernel-source
Views: 1028 Edsel Malasig
Raspberry Pi Emulator for Windows 10   Full Setup Tutorial and Speed Optimization
 
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In this video I'm going to teach you how to setup a Raspberry Pi Emulator for Windows 10 using the latest Raspbian Pixel and some speed optimization tricks. This video will cover how to setup the Raspbian Operating system inside Windows 10, overclock it slightly and also increase the ram through a handy little trick. Here's a few things you will need for this tutorial video: Get Qemu here: http://qemu.weilnetz.de/w32/ Get the kernel here: https://github.com/dhruvvyas90/qemu-rpi-kernel Get Raspbain here: http://downloads.raspberrypi.org/ Grab 7-Zip here: http://7-zip.org Code needed from video: qemu-system-arm -kernel kernel-qemu-4.4.34-jessie -cpu arm1176 -m 256 -M versatilepb -no-reboot -serial stdio -append "root=/dev/sda2 panic=1 rootfstype=ext4 rw init=/bin/bash" -drive "file=2017-03-02-raspbian-jessie.img,index=0,media=disk,format=raw" -redir tcp:2222::22 KERNEL=="sda", SYMLINK+="mmcblk0" KERNEL=="sda?", SYMLINK+="mmcblk0p%n" KERNEL=="sda2", SYMLINK+="root" qemu-img.exe resize 2017-03-02-raspbian-jessie.img +4G Here's some other things you might like :) ★ ★ Raspberry Pi Controllers & Gamepads ★ ★ Amazon (US) ► http://amzn.to/2myQB6e ★ ★ Raspberry Pi Essentials Accessories ★ ★ Amazon (US) ► http://amzn.to/2m0J3aQ ★ ★ Raspberry Pi 3 Power Supply ★ ★ Amazon (US) ► http://amzn.to/2m0KXrW eBay (WorldWide) ► https://u2b.re/e/ESTkGM ★ ★ Raspberry Pi 3 Kit ★ ★ Amazon (US) ► http://amzn.to/2lknC60 eBay (WorldWide) ► https://u2b.re/e/uRElHP ★ ★ Kingston USB 3 Reader ★ ★ Amazon (US) ► http://amzn.to/2mMeB2B eBay (WorldWide) ► https://u2b.re/e/KHsYIQ ★ ★ Samsung Micro SD Memory Cards ★ ★ Amazon (US) ► http://amzn.to/2m0MeQ8 eBay (WorldWide) ► https://u2b.re/e/kYpeqa 💛 Get your FREE 30 day trial to Amazon PRIME http://amzn.to/2wo6ME7 ----- 👁️‍🗨️ What to Watch NEXT in 2018? 👁️‍🗨️ 1️⃣ Kodi VPN Raspberry Pi Tutorial https://youtu.be/Tj1NDMraAkA 2️⃣ Top 5 H4N Pro Upgrades https://youtu.be/7GYbp79JWw4 3️⃣ Windows 10 on Synology NAS https://youtu.be/aNvDwPTN-qQ 4️⃣ Watch Annihilation on Netflix USA https://youtu.be/gAL3v5uNH2E 5️⃣ MX10 Android TV Box Review https://youtu.be/rpFElrN7ExQ ----- 🕛 NEW YouTube videos every Monday and Friday🕛 ----- 💯 Support TechWizTime 💯 💗 Patreon https://www.patreon.com/TechWizTime 💗 PayPal Donations https://www.paypal.me/TechWizTime ----- 💬 Follow TechWizTime 💬 🔔 YouTube https://techwiztime.com/subscribe 🔔 Facebook https://www.facebook.com/TechWizTime 🔔 Twitter https://twitter.com/TechWizTime 🔔 Instagram https://www.instagram.com/TechWizTime 🔔 Website https://techwiztime.com ----- 💟 Affiliate & Sponsor Links 💟 🈹 Amazon US ► http://amzn.to/2lglusP 🈹 Amazon UK ► http://amzn.to/2x2V6qU 🈹 Gearbest ► https://techwiztime.com/gearbest 🈹 PIA VPN ► https://techwiztime.com/vpn 🈹 NordVPN ► https://nordvpn.com/techwiztime 🈹 TubeBuddy ► https://www.tubebuddy.com/TechWizTime ----- ⛔Please send business, marketing and sponsorship emails to ⛔ [email protected] ----- TechWizTime is a participant in the in the Amazon Services LLC Associates, an affiliate advertising programme designed to provide a means for sites to earn advertising fees by advertising and linking to linking to Amazon.com Video © TechWizTime 2014 - 2018. All Rights Reserved. #raspberrypi #techwiztime
Views: 104981 TechWizTime
Shell Scripting Tutorial-37: The 'case' Statement
 
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In this tutorial you'll learn to use the 'case' statement to make decisions. 'case' can sometimes be a better option than the other selection statements such as 'if-else', particularly when the input or decision variable in the script can take any value from a large range of values.
Views: 48783 The Bad Tutorials
PXE Server setup on RHEL 7
 
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In this Video You will See PXE Server setup on RHEL 7 - Red Hat 7 Correction in Video: - "authoritative" Spelling in DHCP.conf ---------------------------------------------------------------------------------------------- Notes - Setting up PXE in RHEL 7 #yum install dhcp tftp-server httpd syslinux wget telnet [base] name=CentOS-$releasever - Base #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os #baseurl=file:///RHEL7-OS baseurl=http://10.0.0.2/rhel7 gpgcheck=0 enabled=1 1. Setting Up dhcp Server - [[email protected] rhel7]# cat /etc/dhcp/dhcpd.conf default-lease-time 600; max-lease-time 7200; authoritative; allow bootp; allow booting; subnet 10.0.0.0 netmask 255.0.0.0 { range 10.0.0.100 10.0.0.200; next-server 10.0.0.2; filename "pxelinux.0"; } 2. Enabling the TFTP - [[email protected] rhel7]# cat /etc/xinetd.d/tftp # default: off # description: The tftp server serves files using the trivial file transfer \ # protocol. The tftp protocol is often used to boot diskless \ # workstations, download configuration files to network-aware printers, \ # and to start the installation process for some operating systems. service tftp { socket_type = dgram protocol = udp wait = yes user = root server = /usr/sbin/in.tftpd server_args = -s /var/lib/tftpboot disable = no per_source = 11 cps = 100 2 flags = IPv4 } cp -v /usr/share/syslinux/pxelinux.0 /tftpboot cp -v /usr/share/syslinux/menu.c32 /tftpboot cp -v /usr/share/syslinux/memdisk /tftpboot cp -v /usr/share/syslinux/mboot.c32 /tftpboot cp -v /usr/share/syslinux/chain.c32 /tftpboot [[email protected] rhel7]# ls /var/lib/tftpboot/ chain.c32 mboot.c32 memdisk menu.c32 netboot/ pxelinux.0 pxelinux.cfg/ [[email protected] syslinux]# pwd /usr/share/syslinux [[email protected] syslinux]# ls -l menu.c32 pxelinux.0 chain.c32 memdisk mboot.c32 rw-r--r- 1 root root 20704 Feb 27 2014 chain.c32 rw-r--r- 1 root root 34396 Feb 27 2014 mboot.c32 rw-r--r- 1 root root 26140 Feb 27 2014 memdisk rw-r--r- 1 root root 56292 Feb 27 2014 menu.c32 rw-r--r- 1 root root 26460 Feb 27 2014 pxelinux.0 [[email protected] rhel7]# ls /var/lib/tftpboot/netboot/ initrd.img vmlinuz # copied from /var/www/html/rhel7/images/pxeboot [[email protected] rhel7]# cat /var/lib/tftpboot/pxelinux.cfg/default default menu.c32 prompt 0 timeout 20 Menu Title Frozen.com PXE menus LABEL RHEL7_x64 MENU LABEL RHEL 7 X64 KERNEL /netboot/vmlinuz APPEND initrd=/netboot/initrd.img inst.repo=http://10.0.0.2/rhel7 [[email protected] rhel7]# systemctl restart xinetd httpd dhcpd systemctl enable xinetd httpd dhcpd
Views: 2218 tech-answer
GNS3-də ASA firewall qurulmasi və loopback adapter ilə birləşdirilməsi
 
09:19
CISCO ASA intrd ve kernel fayllari ucun link: http://rutracker.org/forum/viewtopic.php?t=4281668 Qemu Options: -vnc none -vga none -m 1024 -icount auto -hdachs 980,16,32 Kernel cmd line: -append ide_generic.probe_mask=0x01 ide_core.chs=0.0:980,16,32 auto nousb console=ttyS0,9600 bigphysarea=65536
Views: 114 Mushviq Ismayilov
Build a topology lab for open ports on firewall
 
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Build a topology lab for open ports on firewall 1. Prepare - DC21 : Domain Controller (pns.vn), IP 10.0.0.21 | DC22 : Terminal server , IP 10.0.0.22 - WIN72 : A machine running Windows 7, IP 10.0.0.73(Loopback), 10.0.0.75(Management), 10.0.2.75(LAN2), 192.168.1.75(Internet - gateway 192.168.1.1) - Firewall ASA 8.42 : IPs Giga0 - 10.0.0.100, Giga1 - 10.0.2.100, Giga2 - 192.168.1.100 - Software and files : GNS3, tftpd32, java , images of ASA 8.42 (asa842-initrd, asa842-vmlinuz), asdm-649.bin 2. Step by step : Build a topology lab for open ports on firewall. Set IPs and default gateway for devices, turn off Firewall local - WIN72 : Install and configure ASA 8.42 + Install a loopback adapter named LB (IP 10.0.0.73), install java, GNS3 + GNS3 - Edit - Preferences... - Quemu - ASA tab : + Identifier : ASA, RAM : 1024 MiB + Qemu Options : -vnc none -vga none -m 1024 -icount auto -hdachs 980,16,32 + Initrd : browse to local of file asa842-initrd, Kernel : browse to local of file asa842-vmlinuz + Kernel cmd line : -append ide_generic.probe_mask=0x01 ide_core.chs=0.0:980,16,32 auto nousb console=ttyS0,9600 bigphysarea=65536 === Save - OK + Drag an ASA firewall, Ethernet switchs, Clouds and connect them + Start ASA firewall - Console, type : enable - Enter - # configure terminal - (config)# interface gigabitEthernet 0 : ip address 10.0.0.100 255.255.255.0, nameif management, security-level 10, no shut - Exit + (config)# interface gigabitEthernet 1 : ip address 10.0.2.100 255.255.255.0, nameif LAN2, security-level 20, no shut - Exit + (config)# interface gigabitEthernet 2 : ip address 192.168.1.100 255.255.255.0, nameif Internet, security-level 30, no shut - Exit + Double-click tftpd32 - Browse to local of file asdm-649.bin - show Dir - display asdm-649.bin - OK + Start - cmd - ping 10.0.0.100 === OK + Console of ASA - exit to # - #copy tftp flash: , host : 10.0.0.73, Source filename : asdm-649.bin - Enter - # configure terminal - (config)# asdm image flash:adsm-649.bin, http server enable, http 10.0.0.22 255.255.255.255 management, username cisco password cisco privilede 15 + Switch connect from LB adapter to Management adapter - DC22 : Install java, ASDM + Click Internet Explorer - https://10.0.0.100 - Continue to this website (not recommended). - Install ASDM Launcher - Enter username and password - Run and next to Install - Device IP Address / Name : 10.0.0.100, Enter username and password === OK + Start - cmd - ping 8.8.8.8 -t === Check connect to Internet - WIN72 : Configure route and NAT from 10.0.0.0/24(Management) to Internet + Console ASA : (config)# route internet 0.0.0.0 0.0.0.0 192.168.1.1 === Set default route (config)# object network MANAGE_Internet === NAT from 10.0.0.0/24(Management) to Internet (config-network-object)# subnet 10.0.0.0 255.255.255.0 (config-network-object)# nat (Management,Internet) dynamic interface - DC22 : Check ping 8.8.8.8 === OK
Views: 328 microsoft lab
Shell Scripting Tutorial-3 Linux Directory Structure Amazing way to understand
 
08:40
#shell_scripting #unix_scripting #scripting Shell Scripting Tutorial-3 Linux Directory Structure. Youtube PlayLists Shell-Scripting: https://goo.gl/a1Hu3s Linux-Commands: https://goo.gl/QDoL7h RHCSA Certification: https://goo.gl/X2Ksqn Putty Software Tricks: https://goo.gl/MB1Do2 Linux OS: https://goo.gl/62p8s9 Follow Us on Social Media Telegram Group: https://goo.gl/KPvMda https://arkit.co.in/one-linux-tutorial/ Reddit: http://bit.ly/redditark https://goo.gl/mcUvef Mailing List: http://bit.ly/feedburnerark https://goo.gl/fb/WAU7JG Facebook: https://fb.com/linuxarkit https://goo.gl/2QN4sD LinkedIn: http://bit.ly/linkedark https://goo.gl/ZLcikC Twitter: https://twitter.com/aravikumar48 Google Plus: http://bit.ly/gplusark https://goo.gl/79zwX9
Views: 4475 Tech Arkit
A little about Passthrough, PCIe, IOMMU Groups and breaking them up
 
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This video is about PCIe passthrough to KVM virtual machines. It discusses what IOMMU is and how it works, the PCIe architecture and how it can effect iommu groupings. The video also shows some solutions for dealing with passing through devices when they are not alone in an iommu group. Please, if you can and want to support the channel and donate https://goo.gl/dw6MLW Or check my patreon page https://www.patreon.com/spaceinvaderone Music credits "Epic" composed and performed by Bensound from http://www.bensound.com/ Song "Demension" by Creo https://youtu.be/51tMCy8vhSM licensed under https://creativecommons.org/licenses/... Song "Showdown" by Creo https://youtu.be/51tMCy8vhSM licensed under https://creativecommons.org/licenses/... Dutty | YouTube Audio Library
Views: 10953 Spaceinvader One
ASA in GNS3
 
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http://www.4shared.com/account/dir/mlB1K99y/_online.html#dir=32919533 GO TO EDIT PREFRENCES ASA TYPE FOLLOWING SETTINGS Qemu options: -hdachs 980,16,32 -vnc :1 Initrd: C:\ASA\asa.gz Kernel: C:\ASA\vmlinuz Kernel cmd line: -append auto nousb ide1=noprobe bigphysarea=16384 console=ttyS0,9600n8 hda=980,16,32 cd /mnt/disk0 /mnt/disk0/lina_monitor class-map inspection_default match default-inspection-traffic ! ! policy-map type inspect dns preset_dns_map parameters message-length maximum 512 policy-map global_policy class inspection_default inspect dns preset_dns_map inspect h323 h225 inspect h323 ras inspect rsh inspect rtsp inspect sqlnet inspect sunrpc inspect xdmcp inspect sip inspect netbios inspect tftp inspect ftp ! service-policy global_policy global
Views: 3413 shadaabccie
Shell Scripting Tutorial for Beginners 2 - using Variables and Comments
 
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In Linux (Shell), there are two types of variable: (1) System variables - Created and maintained by Linux itself. This type of variable defined in CAPITAL LETTERS. (2) User defined variables (UDV) - Created and maintained by user. This type of variable defined in lower letters. Shell variables - var refers to the name, $var to the value - t = 100 #Sets var t to value 100 - echo ”\$t = $t” #will print: $t = 100 - Remove a variable with unset var - Names begin with alpha characters and include alpha, numeric, or underscore -------------------Online Courses to learn---------------------------- Data Analytics with R Certification Training- http://bit.ly/2rSKHNP DevOps Certification Training - http://bit.ly/2T5P6bQ AWS Architect Certification Training - http://bit.ly/2PRHDeF Python Certification Training for Data Science - http://bit.ly/2BB3PV8 Java, J2EE & SOA Certification Training - http://bit.ly/2EKbwMK AI & Deep Learning with TensorFlow - http://bit.ly/2AeIHUR Big Data Hadoop Certification Training- http://bit.ly/2ReOl31 AWS Architect Certification Training - http://bit.ly/2EJhXjk Selenium Certification Training - http://bit.ly/2BFrfZs Tableau Training & Certification - http://bit.ly/2rODzSK Linux Administration Certification Training-http://bit.ly/2Gy9GQH ----------------------Follow--------------------------------------------- My Website - http://www.codebind.com My Blog - https://goo.gl/Nd2pFn My Facebook Page - https://goo.gl/eLp2cQ Google+ - https://goo.gl/lvC5FX Twitter - https://twitter.com/ProgrammingKnow Pinterest - https://goo.gl/kCInUp Text Case Converter - https://goo.gl/pVpcwL ------------------Facebook Links ---------------------------------------- http://fb.me/ProgrammingKnowledgeLearning/ http://fb.me/AndroidTutorialsForBeginners http://fb.me/Programmingknowledge http://fb.me/CppProgrammingLanguage http://fb.me/JavaTutorialsAndCode http://fb.me/SQLiteTutorial http://fb.me/UbuntuLinuxTutorials http://fb.me/EasyOnlineConverter
Views: 144670 ProgrammingKnowledge
HAProxy unable to load SSL private key from PEM file
 
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HAProxy unable to load SSL private key from PEM file http://fosshelp.blogspot.in/2016/11/how-to-create-pem-file-for-haproxy.html 1 Generate a unique private key KEY $sudo openssl genrsa -out mydomain.key 2048 Note: Content in this file start with -----BEGIN RSA PRIVATE KEY----- 2 Generating a Certificate Signing Request CSR $sudo openssl req -new -key mydomain.key -out mydomain.csr Note: Content in this file start with -----BEGIN CERTIFICATE REQUEST----- 3 Creating a Self-Signed Certificate CRT $openssl x509 -req -days 365 -in mydomain.csr -signkey mydomain.key -out mydomain.crt Note: Content in this file start with -----BEGIN CERTIFICATE----- 4 Append KEY and CRT to mydomain.pem $sudo bash -c 'cat mydomain.key mydomain.crt /etc/ssl/private/mydomain.pem' Note: This pem file contains 2 sections certificates, one start with -----BEGIN RSA PRIVATE KEY----- and another one start with -----BEGIN CERTIFICATE----- 5 Specify PEM in haproxy config $ sudo vim /etc/haproxy/haproxy.cfg listen haproxy bind 0.0.0.0:443 ssl crt /etc/ssl/private/mydomain.pem mode http option http-server-close option forwardfor reqadd X-Forwarded-Proto:\ https reqadd X-Forwarded-Port:\ 443 option forwardfor if-none balance roundrobin option abortonclose server 192.168.100.224 192.168.100.224:1443 check inter 10s rise 2 fall 3 ssl verify none 6 Restart haproxy $ sudo service haproxy restart
Views: 2338 ATOM
3 Best way to fix just in time debugging problem 100% working
 
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Just-In-Time debugging launches Visual Studio automatically when an exception or crash occurs in an application that is running outside Visual Studio. This enables you to test your application when Visual Studio is not running, and begin debugging with Visual Studio when a problem occurs. Just-In-Time debugging works for Windows desktop apps. It does not work for Windows Universal apps, and it does not work for managed code that is hosted in a native application, such as Visualizers. Step 1. If you are running a web app in Internet Explorer, disable script debugging. Step2. You can enable or disable Just-In-Time debugging from the Visual Studio Tools / Options dialog box Step3. To disable Just-In-Time debugging by editing the registry For any Query post comment or Email me: [email protected] Find me on facebook: https://facebook.com/khaliqdad.izrailhaxor
Views: 93229 Khaliq Izrail Haxor
How to set up a TFTP server on Fedora 21 and allow PXE booting
 
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***In this demonstration I am running Fedora in a Virtual Machine and I created a 2nd VM to PXE boot.*** I would like to create a video that goes into how to install everything but for now these are the instructions: Install Fedora 21 Workstation (https://getfedora.org). set IP address static: 192.168.1.2 255.255.255.0 192.168.1.1 yum install tftp-server xinetd dhcp syslinux -y Change firewall settings to allow tftp (UPD port 69) create a file called tftp in /etc/xinetd.d/ Copy & paste this: service tftp { socket_type = dgram protocol = udp wait = yes user = root server = /usr/sbin/in.tftpd server_args = -s /var/lib/tftpboot disable = no per_source = 11 cps = 100 2 flags = IPv4 } create a file called dhcpd.conf in /etc/dhcp Copy & paste this (do an ifconfig to find out the name of your ethernet adapter for DHCPDARGS): ddns-update-style interim; DHCPDARGS=enp0s8; default-lease-time 86400; max-lease-time 604800; authoritative; allow booting; allow bootp; ignore client-updates; subnet 192.168.1.0 netmask 255.255.255.0 { option subnet-mask 255.255.255.0; option broadcast-address 192.168.1.255; range dynamic-bootp 192.168.1.150 192.168.1.250; filename "pxelinux.0"; } The TFTP files will be stored at /var/lib/tftpboot In this folder you will copy over pxelinux.0 and any other files you may use to PXE boot. In my demonstration I copied over a Damn Small Linux (DSL) CD to show that I can boot it over the network. You will need to create a folder called pxelinux.cfg Create a file inside pxelinux.cfg called default (this is where you create the boot menu). My file contains this to boot to DSL: DEFAULT /pxelinux.cfg/vesamenu.c32 MENU BACKGROUND /pxelinux.cfg/splash.jpg # Boot the kernel and initramfs over PXE. label DSL KERNEL dsl/linux24 APPEND ramdisk_size=100000 init=/etc/init lang=us vga=791 initrd=dsl/minirt24.gz quiet Once you have all the files in place you can run the following commands: service xinetd restart service tftp restart service dhcpd restart Now you can plug a computer/laptop into your switch and boot from the network card. This can be used to also install Windows, clone a hard drive, pull data from a hard drive when you can't boot into Windows...The list goes on and on.
Views: 3553 Bill Tux
How to Add / install and configure ASA Firewall in GNS3 in Urdu and Hindi
 
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In this video I wanna go to show you how to add / install and configure cisco ASA 8.4(2) Firewall in GNS3 latest version 2.1.14. Download initrd and kernal files from here! https://drive.google.com/drive/folders/0BxGGwKJEWVB0dzd5aFMzTjRNcDg?usp=sharing Kernel command line: -append ide_generic.probe_mask=0x01 ide_core.chs=0.0:980,16,32 auto nousb console=ttyS0,9600 bigphysarea=65536 no-hlt QEMU Options: -vnc none -vga none -m 1024 -icount auto -hdachs 980,16,32 Once the ASA is up, enter enable and then enter the following to activate features (these activation keys might be take a long time to apply – maybe 10-15 minutes or more, so be patient): activation-key 0x4a3ec071 0x0d86fbf6 0x7cb1bc48 0x8b48b8b0 0xf317c0b5 activation-key 0xb23bcf4a 0x1c713b4f 0x7d53bcbc 0xc4f8d09c 0x0e24c6b6 If you like the video, press the Like button CCIE Academy Vidoes. If you think that this video needs improvements, leave a comment below. If you are interested in my channel, so subscribe to be notified if a new video is released Inshallah.
Views: 40 CCIE Academy
Gns3 Cisco ASA 9.15 Step by Step Installation
 
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Step by Step Installation of Cisco ASA 9.15 Firewall in Gns3. Kernel Command Line: no-hlt -append ide_generic.probe_mask=0x01 ide_core.chs=0.0:980,16,32 auto nousb console=ttyS0,9600 bigphysarea=65536 Option: -vnc none -vga none -m 1024 -icount auto -hdachs 980,16,32 Download the files: https://www.dropbox.com/sh/cnujcn7cr53n5ij/AAAVnEU0Ock2LMdKjOJdRMbta?dl=0 Website: https://bitexpert.wixsite.com/home Facebook Page: https://www.facebook.com/BitExpert.Sagar/
Views: 5936 BitExpert
fedora22 windows8 dual boot grub fixed win8 installed later
 
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Most newbies get their pre-existing linux's GRUB boot record when they try to install windows on blank space/partition of a system which had already linux installed and working fine. In such situation, you can not have your pre-existing linux GRUB boot loader at boot time. There is only windows system which was installed later. If you want to rescue your corrupted linux GRUB boot loader which should have linux and windows boot entries to switch to an OS on needs, this tutorial is for you. Here, I have written this tutorial for situation in which linux GRUB boot loader was corrupted due to fedora 22 installed first and later windows 8 installed later for the sake of making system dual bootable. But this tutorial can be equally applicable to address such situation of any linux and windows dual boot combination. My god damn... Situation: I just logged into windows 8 desktop, but, wait a minute man... I had already installed Fedora 22 installed in this PC/Laptop which was running smoothly before installing Windows 8 into a blank partition. Then, where has my fedora 22 GRUB boot loader gone ? The FIX: If we install First Windows and Linux later, Linux GRUB boot loader is updated with pre-existing windows boot entry. As a result, we have GRUB containing all OS's boot entry and we can switch to any of OS at boot time. Ok, how to get our Fedora 22 GRUB Boot loader containing Linux and Windows boot entry then ? The steps are: 1. Reboot the system with Fedora 22 live DVD/ISO/USB 2. press Tab to Edit boot entry and append rw init=/bin/bash option at the end of vmlinuz kernel option, then press Enter to boot it 3. Shortly we get dropped into bash shell prompt. 4. Type su - at bash prompt to enter into super user prompt of live session 5. Proceed as following: #mkdir /mnt/recovery_image #mount /dev/sdaX /mnt/recovery_image [where X stands for HDD partition number eg sda1, sda2, hda1, hda2, etc normally it is sda1 for Linux installed first then windows installed later situation. IF mount fails, check which partition contains /boot directory contents of Linux by doing ls -la /dev/sda1 or ls -la /dev/sda2, etc until /boot is found] #mount --bind /dev/ /mnt/recover_image/dev/ #mount --bind /proc/ /mnt/recover_image/proc/ #mount --bind /sys/ /mnt/recover_image/sys/ 6. Change working root to recovery PWD #chroot /mnt/recover_image 7.Re-install grub loader to /dev/sda grub2-install /dev/sda 8.Remove the live bootable DVD, USB or ISO and Hard-Reset the system because reboot, shutdown, poweoff none will work in this mode 9.After rebooting we'll get only Fedora GRUB info and we can boot as normal. What ? have we lost windows 8 entry again ? Yes. We've intentionally lost Windows boot loader as we re-installed Grub 10.Login to Fedora and fire a shell, uplift privilege to super user and update the grub bool loader as follows #grub2-mkconfig -o /boot/grub2/grub.cfg This should find Fedora 22 as well as Windows 8 boot records and add them into the grub.cfg file. 11.Restart to verify we have Windows 8 boot entry in Fedora 22 GRUB screen. DONE NOTE: This approach is equivalently applicable to the combination of any other windows and linux dual boot situation in which windows was installed later.
Views: 213 Suresh Pun
Shell Scripting Tutorial for Beginners 9 -  Logical 'OR' Operator
 
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The Logical OR "||" is a boolean operator that executes following commands based on the outcome of previously executed commands. Logical OR (||) if [[expr1 ||expr2]] Returns expr1 if it can be converted to false; otherwise, returns expr2. Thus, when used with Boolean values, && returns true if one operands are true; otherwise, returns false. - for using And operator use || if [ "$age" -gt 18] || ["$age" -lt 30 ] - The -o option provide an alternative compound condition test. if [ "$age" -gt 18 -o "$age" -lt 30 ] - if [[ $condition1 || $condition2 ]] # Also works. if [[ "$age" -gt 18 || "$age" -lt 30 ]] -------------------Online Courses to learn---------------------------- Blockchain Course - http://bit.ly/2Mmzcv0 Big Data Hadoop Course - http://bit.ly/2MV97PL Java - https://bit.ly/2H6wqXk C++ - https://bit.ly/2q8VWl1 AngularJS - https://bit.ly/2qebsLu Python - https://bit.ly/2Eq0VSt C- https://bit.ly/2HfZ6L8 Android - https://bit.ly/2qaRSAS Linux - https://bit.ly/2IwOuqz AWS Certified Solutions Architect - https://bit.ly/2JrGoAF Modern React with Redux - https://bit.ly/2H6wDtA MySQL - https://bit.ly/2qcF63Z ----------------------Follow--------------------------------------------- My Website - http://www.codebind.com My Blog - https://goo.gl/Nd2pFn My Facebook Page - https://goo.gl/eLp2cQ Google+ - https://goo.gl/lvC5FX Twitter - https://twitter.com/ProgrammingKnow Pinterest - https://goo.gl/kCInUp Text Case Converter - https://goo.gl/pVpcwL -------------------------Stuff I use to make videos ------------------- Stuff I use to make videos Windows notebook – http://amzn.to/2zcXPyF Apple MacBook Pro – http://amzn.to/2BTJBZ7 Ubuntu notebook - https://amzn.to/2GE4giY Desktop - http://amzn.to/2zct252 Microphone – http://amzn.to/2zcYbW1 notebook mouse – http://amzn.to/2BVs4Q3 ------------------Facebook Links ---------------------------------------- http://fb.me/ProgrammingKnowledgeLearning/ http://fb.me/AndroidTutorialsForBeginners http://fb.me/Programmingknowledge http://fb.me/CppProgrammingLanguage http://fb.me/JavaTutorialsAndCode http://fb.me/SQLiteTutorial http://fb.me/UbuntuLinuxTutorials http://fb.me/EasyOnlineConverter
Views: 31559 ProgrammingKnowledge
wifi_dump.rb - ESSID credentials dump
 
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This post-exploitation module requires a meterpreter session to be hable to dump ESSID stored passwords (WLAN/LAN) using CMD native NETSH command, appends reports to a logfile and downloads it from target host to a selected Local directory (set DOWNLOAD_PATH). . This module will report active interface, a list of ESSIDs stored, shows NEARBY wireless networks, and gives the ability to delete the selected ESSID from target host interface... . This module will NOT be able to dump ESSID credentials from VMs, NAT or Bridged Networks, Also remmenber to check module advanced options for more settings... . . Post-module article: https://sourceforge.net/p/msf-auxiliarys/discussion/general/thread/a8e7aa57/ . . Special thanks to: [email protected] for all the help and time spent in developing/debuging and recording this post-module with me ...
Views: 718 MrPedroubuntu
Macro Definition ll Calling a Macro ll Expansion of Macro Explained with Examples in Hindi
 
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📚📚📚📚📚📚📚📚 GOOD NEWS FOR COMPUTER ENGINEERS INTRODUCING 5 MINUTES ENGINEERING 🎓🎓🎓🎓🎓🎓🎓🎓 SUBJECT :- Discrete Mathematics (DM) Theory Of Computation (TOC) Artificial Intelligence(AI) Database Management System(DBMS) Software Modeling and Designing(SMD) Software Engineering and Project Planning(SEPM) Data mining and Warehouse(DMW) Data analytics(DA) Mobile Communication(MC) Computer networks(CN) High performance Computing(HPC) Operating system System programming (SPOS) Web technology(WT) Internet of things(IOT) Design and analysis of algorithm(DAA) 💡💡💡💡💡💡💡💡 EACH AND EVERY TOPIC OF EACH AND EVERY SUBJECT (MENTIONED ABOVE) IN COMPUTER ENGINEERING LIFE IS EXPLAINED IN JUST 5 MINUTES. 💡💡💡💡💡💡💡💡 THE EASIEST EXPLANATION EVER ON EVERY ENGINEERING SUBJECT IN JUST 5 MINUTES. 🙏🙏🙏🙏🙏🙏🙏🙏 YOU JUST NEED TO DO 3 MAGICAL THINGS LIKE SHARE & SUBSCRIBE TO MY YOUTUBE CHANNEL 5 MINUTES ENGINEERING 📚📚📚📚📚📚📚📚
Views: 9078 5 Minutes Engineering
Linux Kernel Programming Introduction
 
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You can find all the examples that I am sharing here in the GitHub link https://github.com/aqunion/ldd-learning We are using the GNU toolchain to compile the modules and writing the code in the c syntax. Modules are nothing but a means of adding new services to the kernel. We need to keep in mind when we are developing some kernel modules 1) Modules are going to be appended into the kernel space/Kernel Mode. Any module whichever you are implementing, the module should not include any userspace headers or userspace API calls. 2) The include files that you include in the modules should be from the kernel header files. UserSpace header files will be available at /usr/include and kernel header files will be available at /lib/modules/ I am running on XYZ, we are using relative paths. We need to mention in the make file from where the header files should be included. 3) There are few header files which the module need to include, they are the module.h, version.h, kernel.h and init.h. They provide the constant, signatures which were needed by the modules There is a subsystem called kmod in the kernel which will provide constants, data types and functions which we need for initialization and various other jobs. The version.h is used for including the version stamp which is used to identify for which kernel version you built the module Kernel.h is one more header file which will provide access to the kernel symbol table which will provide access to various global functions and other stuff which the module required to function properly Init.h provides us with the inline functions which we can use to register and unregister the module. Depending on the what code you put in the module, there will be more header files that you need to include. When inserting the module, it will call the init function and when removing the module it will call the exit function(Explain about the signature) We need to use the appropriate module comments. Module comments will be available from the module.h, and comments will be useful when debugging the module. Module license is mandatory and others are not mandatory. Other than the module comments, init and clean up routines comes under the module body, this is what we are trying to insert into the kmod. To add this into the kernel mode, we are packing everything with the init, clean up and comments etc. To build this you need to write the makefile which will pull the scripts from the kernel source which is /usr/src/linux-version/scripts Obj-y for static building Obj-m for dynamic module building Insmod is for inserting the module. You can verify this using the lsmod which is very simple one Or you can use the cat /proc/modules to see the list of modules To remove the module use the rmmod Cheers, QuantumBuddy Website: http://www.quantumbuddy.com/ Fb: https://www.facebook.com/QuantumBuddy/ twitter: https://twitter.com/QuantumBuddy8
Views: 57 QuantumBuddy
antiX 13.2 - MX-14 - VirtualBox - Set up a Shared Folder Between Guest & Host OS
 
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Setting up a shared folder between guest and host OS in VirtualBox, using an antiX 13.2 host and a mx-14 guest. Basic Steps: 1. Install VirtualBox Guest Additions. 2. Enable your Guest OS user in the vboxsf group. 3. Shutdown Guest and use the Virtual Box Manager to select a shared folder. Choose the automount option. 4. Reboot the Guest. Folder should be available in /media with a "sf_" appended to its name. see this previous video on installing VirtualBox in MX-14. https://www.youtube.com/watch?v=cFI0hzb6t2I Thanks for Watching! d.o.
Views: 970 runwiththedolphin
[Demo] Lubuntu on Acer Iconia Tab A500
 
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In this video I show Lubuntu Linux running on my Acer Iconia Tab A500. ***DETAILS BELOW!*** It is booting from /data/linux so there are no new partitions made during the process. Full details of how to do it are over at TegraOwners: http://adf.ly/UquCA The boot process is as follows (technical info): -Power On -Skrilax bootloader v9 loads up -Skrilax bootloader loads the bootmenu from FLX:/menu.skrilax (Flexrom, although this can be on any partition you want) -Choose Lubuntu (option in menu.skrilax) -Skrilax bootloader loads the zImage (Linux kernel) from FLX:/zImage into memory -The ramdisk is appended (also stored in the flexrom at FLX:/initramfs.gz) -The kernel is then booted with the data partition as the room -The ramdisk script fuse mounts the data partition to a new folder then effectively chmods to the linux folder -Lubuntu boots
Views: 7492 blackthund3r Channel
Research Computing | Linux Resources & Obtaining Help
 
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In this module, we will continue our discussions about the Linux Operating system with a discussion of Linux ‘man pages’. The Linux man pages are the most popular method of obtaining help about how to run commands. At the conclusion of this module, we hope you will have a better understanding of how to obtain information when using the command line interface. At the end of this session, you will be able to: Recognize the typical manual format Use the `man` command Search through the available corpus of text Find other resources for Linux help The first unix system was built in 1969. As is typical of computer scientists, no documentation for the new system existed until 1971, and then only at the request of management. Man is a abbreviation of the word ‘manual’, and provides a method for learning about the commands that exist within the system. To use man, type man, then a space, and then the command you want to learn more about. You can see that the format is simple and easy to read. Navigation within the man pages is handled by the arrow keys on your keyboard. Pressing the down arrow will scroll the page down one line, allowing you to read more of the page. Conversely, pressing the up arrow scrolls the page up one line. To exit out of the man page, simply press the ‘q’ key on your keyboard. Each man page is written by the author of the command. Because of this, each man page can have different headings, but many follow a standard format that includes the following information: The name of the command A short synopsis of how the command is used. There are a few idiosyncrasies about the Synopsis: o Anything in square brackets is not required to be included o Whenever you see an ellipsis – three dots or periods in succession – the previous option can be used any number of times A description of what the command does, or what output you can expect, and a listing of all available options. o Command line options, when they are used in conjunction with the program, will typically either Alter the behavior of the command as it is executed, or Alter the output of the command by expanding, or truncating the output Examples of how to use the command and what output, or behavior, you can expect from it A listing of similar, or closely related, commands for which you can then read the manual. You can use the ‘-k’ flag appended to the man command to search thorough a database of man pages. This can be useful to find commands that are similar in function to the original. You can also search the full text of the man page by pressing the forward-slash (‘/’), typing the word for which you want to search, then pressing enter. This should highlight the search term within the man page. After you have searched for the string, you can press the ‘n’ and ‘p’ keys to proceed to the next, or previous, instance of the search term. No discussion of Linux help pages would be complete without mentioning the variety of resources that are available in other locations. There is an online repository of manual pages at the kernel.org website, which can be extremely useful to reference while using the command line Google, or any other search engine, can provide a wealth of information on any particular topic. Lynda.com is an online repository of tutorials and videos that has an extensive selection of tutorials on the Linux Operating System. When using a new system, it is very important to have the ability to access relevant documentation on its purpose and function. The Linux manual pages provide ample coverage, but can be easily supplemented by some great online resources. In this video, we have covered several different ways of obtaining more information about specific unix commands, including: Using the ‘man’ command; Searching through the manual database using ‘man –k’; Searching through the actual man pages with the forward-slash (‘/’); and Locating other online resources for supplemental material. We recommend that you understand the material presented here before continuing with the next videos. See you next time.
How to use MAN pages and Info Pages in linux
 
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http://linuxstudyguide.com How to use man pages and info pages to get information on commands for linux.
Views: 7211 TheCiscoNoob
Linux Command Line Tutorial For Beginners 16 - echo command
 
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echo [options] [string, variables...] Displays text or variables value on screen. Options -n Do not output the trailing new line. -e Enable interpretation of the following backslash escaped characters in the strings: \a alert (bell) \b backspace \c suppress trailing new line \n new line \r carriage return \t horizontal tab \\ backslash For eg. $ echo -e "An apple a day keeps away \a\t\tdoctor\n" -------------------Online Courses to learn---------------------------- Blockchain Course - http://bit.ly/2Mmzcv0 Big Data Hadoop Course - http://bit.ly/2MV97PL Java - https://bit.ly/2H6wqXk C++ - https://bit.ly/2q8VWl1 AngularJS - https://bit.ly/2qebsLu Python - https://bit.ly/2Eq0VSt C- https://bit.ly/2HfZ6L8 Android - https://bit.ly/2qaRSAS Linux - https://bit.ly/2IwOuqz AWS Certified Solutions Architect - https://bit.ly/2JrGoAF Modern React with Redux - https://bit.ly/2H6wDtA MySQL - https://bit.ly/2qcF63Z ----------------------Follow--------------------------------------------- My Website - http://www.codebind.com My Blog - https://goo.gl/Nd2pFn My Facebook Page - https://goo.gl/eLp2cQ Google+ - https://goo.gl/lvC5FX Twitter - https://twitter.com/ProgrammingKnow Pinterest - https://goo.gl/kCInUp Text Case Converter - https://goo.gl/pVpcwL -------------------------Stuff I use to make videos ------------------- Stuff I use to make videos Windows notebook – http://amzn.to/2zcXPyF Apple MacBook Pro – http://amzn.to/2BTJBZ7 Ubuntu notebook - https://amzn.to/2GE4giY Desktop - http://amzn.to/2zct252 Microphone – http://amzn.to/2zcYbW1 notebook mouse – http://amzn.to/2BVs4Q3 ------------------Facebook Links ---------------------------------------- http://fb.me/ProgrammingKnowledgeLearning/ http://fb.me/AndroidTutorialsForBeginners http://fb.me/Programmingknowledge http://fb.me/CppProgrammingLanguage http://fb.me/JavaTutorialsAndCode http://fb.me/SQLiteTutorial http://fb.me/UbuntuLinuxTutorials http://fb.me/EasyOnlineConverter
Views: 25222 ProgrammingKnowledge
Internet Archive: Universal Access. Open APIs
 
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VM Brasseur https://linux.conf.au/schedule/30354/view_talk With tens of millions of items in its collections, Internet Archive is one of the largest libraries in the world. It provides free and open access to all of its materials to anyone with an internet connection, making it a treasure trove for researchers, historians, and curious individuals. Of course, having a collection that large doesn't help anyone if it's difficult to access. To help with this, Internet Archive has released a number of open APIs and tools to allow people to upload and download items, as well as data mine the metadata for the entire collection. In this session we will: Give you a tour of Internet Archive and its collections Introduce you to the APIs and tools you can use to access and contribute to the Archive Show examples of how other people and institutions are using the Archive
Linux Tutorial for Beginners: Introduction to Linux Operating System
 
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http://www.guru99.com/unix-linux-tutorial.html Linux is the most popular server OS(Operating System). Linux is a clone of UNIX. Knowing one is as good as knowing the other. This tutorial is for absolute beginners. You will know how Linux works. You can learn Linux, by installing it right on your existing Windows or Mac OS systems! (Detailed steps to install Ubuntu given in tutorials). Click on the time points below to view different sections! 6:50 Most Popular Linux distros 8:37 Installing Linux – VirtualBox 18:05 Introduction to Linux operating system and comparison with windows 24:32 Terminal vs. File Manager 27:20 Command Line Interfaces on Ubuntu Operating system 49:19 Brief of Linux commands 52:04 Ownership in Linux Files (Permissions in Linux) 1:04:58 Print, Email & Install Software on Linux 1:25:34 Regular expressions In Linux/Ubuntu 1:30:46 Basic Environment Variables 1:35:56 Communication in Linux 1:37:21 FTP (File transfer protocol) 1:42:35 Types of Processes in Linux 1:54:07 VI Editor Tutorial 2:01:45 Shell Scripting In Linux 2:09:11 What is PERL Programming 2:13:58 Virtual Terminal 2:20:00 Unix Administration in Linux What is Linux? Linux is an operating system (kernel). It is distributed under an open source license. Its functionality list is quite like UNIX. Like, share and subscribe our channel for more videos. Enjoy our free tutorial on our YouTube channel and our website. Watch more videos on our YouTube channel at https://www.youtube.com/channel/UC19i1XD6k88KqHlET8atqFQ READ this as a book on Amazon by viewing at http://amzn.to/2gZGjbE (Linux) Visit our website for more! www.guru99.com FACEBOOK! Would you prefer to watch more about us? Like our page for more https://www.facebook.com/guru99com/ TWITTER! Tweet for us on Twitter with #guru99 and follow us on https://twitter.com/guru99com THANKS! We appreciate you reading this and hope you have a wonderful day! Sincerely, Guru99
Views: 372159 Guru99
[SOLVED] OSError: [Errno 22] Invalid argument:...
 
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[#SOLVED] [FIXED] #OSError: [Errno 22] Invalid argument: 'yourfilename' appears when trying to open/read/write/create a file in #Python 3.
Views: 2313 binary_sloth
Global variable Buffer Overflow to leak memory - 34C3 CTF readme_revenge (pwn)
 
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Two years ago I failed to solve the readme challenge at the 32c3ctf. Since then I have learned a lot and I got another chance! readme 32c3ctf: https://www.youtube.com/watch?v=wLsckMfScOg readme_revenge: https://archive.aachen.ccc.de/34c3ctf.ccc.ac/challenges/index.html What is CTF? https://www.youtube.com/watch?v=8ev9ZX9J45A Why you should play CTFs: https://www.youtube.com/watch?v=rfjV8XukxO8 -=[ 🔴 Stuff I use ]=- → Microphone:* https://amzn.to/2LW6ldx → Graphics tablet:* https://amzn.to/2C8djYj → Camera#1 for streaming:* https://amzn.to/2SJ66VM → Lens for streaming:* https://amzn.to/2CdG31I → Connect Camera#1 to PC:* https://amzn.to/2VDRhWj → Camera#2 for electronics:* https://amzn.to/2LWxehv → Lens for macro shots:* https://amzn.to/2C5tXrw → Keyboard:* https://amzn.to/2LZgCFD → Headphones:* https://amzn.to/2M2KhxW -=[ ❤️ Support ]=- → per Video: https://www.patreon.com/join/liveoverflow → per Month: https://www.youtube.com/channel/UClcE-kVhqyiHCcjYwcpfj9w/join -=[ 🐕 Social ]=- → Twitter: https://twitter.com/LiveOverflow/ → Website: https://liveoverflow.com/ → Subreddit: https://www.reddit.com/r/LiveOverflow/ → Facebook: https://www.facebook.com/LiveOverflow/ -=[ 📄 P.S. ]=- All links with "*" are affiliate links. LiveOverflow / Security Flag GmbH is part of the Amazon Affiliate Partner Programm. #CTF #BinaryExploitation
Views: 36893 LiveOverflow
Bsquare Maui - Jlime Henchman success!
 
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Third video, this time I got PXA MMC Host working, so tried to boot something from it. As described on my first video, Maui is similar to MP900/c, so I taken Jlime Henchman rootfs... and guess what? It's working! They were some errors visible - i had only 128MB card, too small for full rootfs. What's working: - initramfs (option) /* UPDATE: on 2.6.24-hpc, on 2.6.32-hpc there's a bug that disallow this) - Epson framebuffer - PXA25x MMC Host What's not: - Keyboard Unknown: - USB port - Xorg - Touchscreen Sorry for low quality... recorded using a calculator. Seriously.
Views: 448 Kajetan Krykwiński

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