I am having a hard time getting the supposedly randomly generated passwd for the amd64 qcow2 image here:


I found the (perhaps outdated?) instructions here:


Things seem to have changed, and I don't see the line in the console output, and ctrl-alt-3 for serial console doesn't work for me (i entered via virsh console vm_name).

1 Answer 1


You can use libguestfs-tool to clear the root passwd.

    sudo apt install libguestfs-tools
    virt-edit -a disk.img /etc/passwd -e 's/^root:.*?:/root::/'

See http://libguestfs.org/guestfs-recipes.1.html under "Remove root password (Linux)"

But why can't Ubuntu just put up a decent page on how to use their CloudImages for novices???

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