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

  • Windows Cannot Format USB drive Device Media is Write Protected Error Solution
  • Linux Mint 20 cannot install snapd missing solution
  • Virtualbox VBOX How To Install Guest-Utils/GuestUtils so drag and drop and clipboard works Ubuntu Mint Debian Linux
  • vi how to delete everything to the end of the line or the rest of the line from the cursor
  • Cisco Howto Configure Console Port/Terminal/Comm Server with Async Cable Setup
  • Ubuntu/Debian Linux/Unix Howto Setup Install Syslinux Bootable USB with EFI and MBR from Command Line/CLI Terminal
  • Cisco Switch Howto Reset Password
  • SSH cannot connect to old servers/devices/switches/routers/Cisco/Juniper Unable to negotiate with 192.168.20.2 port 22: no matching key exchange method found. Their offer: diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hell
  • ksnapshot missing in Ubuntu and Linux Mint Solution
  • bash how to hide username/customize prompt Linux Debian Redhat Ubuntu Solution
  • Cisco Router Password Reset Howto Guide Solution Cannot Login /Unknown Enable Password 2600, 2800, 2900, 3900
  • VirtualBox VBox Nat Network Handing Out Wrong IP Address Subnet Solution
  • 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