sudo command throwing 'user is not in the sudoers file'

Asked Nov 23 '22 at 14:50

Active Nov 23 '22 at 16:54

Viewed 479 times

I am on user myuser on Ubuntu and it is only assigned to its own group myuser. sudo -i gives:

user is not in the sudoers file

I cannot log in to a wifi because it is asking for a password and myuser password is failing.

There is no admin on my machine, is there a way to add myuser to the other groups without sudo? Is a complete format/reset of the machine necessary?

The os is Ubuntu 22.04.1 LTS

I cannot access Grub recovery mode because I do not have sudo access to change /etc/default/grub file (recovery mode not loading on holding shift key)

edited Nov 23 '22 at 16:54

asked Nov 23 '22 at 14:50

bcsta

How come you don't have an user with admin rights? – raj Nov 23 '22 at 15:08
Does this answer your question? How do I reset a lost administrative password? – NotTheDr01ds Nov 23 '22 at 16:16
What's the output of cat /etc/group | grep sudo? – Anthony Kelly Nov 23 '22 at 16:27
@AnthonyKelly the output is sudo:x:27: – bcsta Nov 23 '22 at 16:51
2

Does this answer your question? How can I add a user as a new sudoer using the command line? – BeastOfCaerbannog Nov 23 '22 at 17:24
@bcsta Hmmm. I think Recovery Mode is going to be the only option. Did you see this answer that mentioned that it may be the Esc key on UEFI systems? Also, it can be tricky to time the keypress just right - That answer also mentions needing to try it several times. – NotTheDr01ds Nov 23 '22 at 17:56
Also, there's a possibility that another bootloader took its place if you ever dual-booted. Check the BIOS boot order to see if Grub is the default. – NotTheDr01ds Nov 23 '22 at 17:57
Does this answer your question? How do I add myself back as a sudo user? – muru Dec 07 '22 at 11:20

sudo command throwing 'user is not in the sudoers file'

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