I lost sudo package and su was for some reason disabled while I was upgrading Ubuntu to 25.10

[yuki2501@masto.hackers.town]

I lost sudo package and su was for some reason disabled while I was upgrading Ubuntu to 25.10

Now I have a botched version, half upgrade, half not, and I can't even try to upgrade again because my sudo was deleted. What can I do?

HELP!!!

[laprice@beige.party]

@yuki2501 can you boot to rescue mode and mount the filesystem and complete the upgrade?

https://wiki.ubuntu.com/RecoveryMode

[0x4d6165@transfem.social]

@yuki2501@masto.hackers.town try pkexec or run0

[yrabbit@mastodon.sdf.org]

@yuki2501 Well, I'm not a Linux guy, but maybe you could boot from a LiveCD, mount the root file system, chroot, passwd - in other words, create a password for root (I have one, I don't understand why there shouldn't be one :) ).

[yuki@im-in.space]

@yuki2501 add single or ystemd.unit=rescue.target to the kernel command line from grub, that should work

or if anything you can boot from a CD and chroot to your Ubuntu install