chroot into an off-line Linux version using a LiveCD/USB

It's not just as simple as running the chroot command, you need to ensure the /proc and /dev entries are passed through and populated to the chroot environment.

Step 1 - Mount Your Off-line OS

mount /dev/sda1 /mnt

Step 2 - Mount Proc

mount -t proc none /mnt/proc

Step 3 - Mount Dev

Most guides will tell you to use this: mount -o bind /dev /mnt//dev but that doesn't work for some reason in many cases:

mount: wrong fs type, bad option, bad superblock on /dev,
       missing codepage or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

So the work around is to use the following (unless the above works for you, I believe maybe newer versions of mount will be fine):

cp -a /dev /mnt/dev-temp

mount --bind /mnt/dev-temp/ /mnt/dev

Chroot in!

Everything should be fine, I can see my disks and everything functions as normal.  The bad part/side effect is the fact that for some reason I can't see my mdadm entries.


Tags:

chroot, linux, livecd, usbit, ensure, proc, dev, entries, populated, mount, os, sda, mnt, guides, bind, doesn, fs, superblock, codepage, info, syslog, dmesg, newer, versions, cp, temp, disks, functions, mdadm,

Latest Articles

  • Unable to mount location Failed to retrieve share list from server: Connection timed out - Samba/Linux Filesharing Not working Ubuntu Mint Linux Solution
  • How To Resize, Reduce a Video to a Specific Size and Quality Ubuntu Linux using ffmpeg
  • vi how to delete all lines in the file
  • Linux Mint / Ubuntu 20 Intel I219 NIC disconnects
  • Linux can't boot/grub boot loader screen with no options solution
  • EFI PXE grub2 Howto guide for Linux EFI PXE Booting on Debian, Mint, Ubuntu, RHEL
  • Aruba/HP/Dell IAP Wireless Controller Common Default Passwords
  • Debian, Mint Ubuntu how to remove package and associated config files
  • Linux Grub not booting the intended kernel solution in Debian, Mint, Ubuntu how to specify which kernel to boot by default
  • QEMU KVM Keyboard Problems Not Working Right Repeating Characters, Ctrl+C Copy and Paste not working right when using PS2 mouse in guests Solution
  • Linux how to compile binary with static sharedobjects embedded instead of dynamic to use on multi-distributions and avoid glibc compatiblity issues
  • /bin/sh: msgfmt: not found error solution on Linux Compilation Ubuntu Debian Mint Centos
  • Mikrotik RouterOS CHR/ISO Basic and Quick Setup Howto Guide
  • qemu 4 compilation options
  • CentOS 7 8 PXEBoot Netinstall Not Working Solution "Pane is dead "new value non-exisetnt xfs filesystem is not valid as a default fs type"
  • CentOS 6 EOL yum repo won't work Error: Cannot find a valid baseurl for repo: base Solution
  • CentOS 7 8 How To Disable SELinux
  • Wordpress How To Add Featured Image To Post in Hueman Theme
  • kdenlive full reset how to erase all config files
  • CentOS 7 8 yum error Trying other mirror. To address this issue please refer to the below wiki article