What's the username and password for an Ubuntu Live CD image?

I ask because I've recently copied the contents of an Ubuntu based live ISO (easypeasy, the ldistro for nwtbooks) onto a hard disk drive, but the Squashfs file system is corrupt, most likely because I copied it live. :) So it's not autologging in. Is there a username/password for this?

Update: I tried username Ubuntu and a blank password, and it didn't work.

  • Did you try lowercase ubuntu with no password?
    – binki
    May 11 '15 at 0:34
  • password could be: reverse
    – T.Todua
    Dec 24 '16 at 11:25

Try 'ubuntu' with an empty password. If that doesn't work, you're probably best recopying the squashfs.

Note that squashfs is readonly, I assume you mean you copied the unionfs that lies on top of the squashfs and the tmpfs?

  • 'ubuntu' with blank password didn't work. I did a dd of the /dev/sdc (the SD card with the live 'CD' image) to /dev/sda (the harddrive). I think.... Jun 16 '09 at 9:15
  • 3
    Also mention that other flavors may have they own username, for example in Kubuntu 15.04 the user name is 'kubuntu'.
    – Javier Mr
    Apr 30 '15 at 21:42

If the username "ubuntu" with an empty password doesn't work, you may be able to add a new user to the system as follows:

  1. Boot from a live CD, and start a terminal session.
  2. Mount your hard drive partition somewhere, like /mnt (i.e. mount /dev/hda1 /mnt)
  3. chroot /mnt
  4. adduser username
  5. Reboot
  • Confirm works with ubuntu empty password in Xubuntu 16.04 livecd
    – swdev
    Jun 6 '18 at 16:16

I'm not sure what the answer is, but I've solved this another way, so it's not a problem for me anymore. I discovered recently that it's possible to disable the password for an account. You can do this to force ssh key logins. I suspect that's what's going on here.


The default password for the user 'ubuntu' on Ubuntu is blank.

If you want to run the 'Live CD' from your hard disk then there's no need to make an image of it using dd.

You can simply copy the casper directory to your hard disk and create an entry in grub which looks like:

title    Ubuntu Live
uuid     <insert_uuid_of_partition_with_ubuntu_on>
kernel   /lucid32/vmlinuz boot=casper noprompt ignore_uuid live-media-path=lucid32 locale=en_GB.UTF-8 quiet splash --
initrd   /lucid32/initrd.lz

Here I've copied the contents of the casper directory into a directory named /lucid32 on the root of a data partition. It's the UUID of the data partition that's added to GRUB's boot option. The option 'live-media-path=' tells casper, the Ubuntu live boot software, where to look for the filesystem image so you can create the directory by whatever name you like.

Not the answer you're looking for? Browse other questions tagged or ask your own question.