Undo usermod -a -G

Question

I have done

sudo usermod -a -G wireshark user

And then I have rebooted the system (kubuntu). Now, when entering the password for the GUI, kubuntu crashes and returns to the login screen. However, I can login from the console.

How can I undo this command?

This command is not supposed to use any application. It added the user user to the wireshark group. That could not affect your boot process. It looks like it is not related. — Pilot6, Jan 28 '17 at 19:28

Pilot6 · Answer 1 · 2017-01-28T19:48:43.167

1

You can undo it by

sudo deluser user wireshark

but it is not related to your login loop problem.

For Rinzwind from man deluser

deluser [options] user group

 ....

Remove a user from a specific group
       If  called  with  two  non-option arguments, deluser will remove a user
       from a specific group.

--

pilot6@Pilot6:~$ sudo deluser pilot6 vboxusers
Removing user `pilot6' from group `vboxusers' ...
Done.

edited Jan 28 '17 at 19:48

answered Jan 28 '17 at 19:40

Pilot6

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are you sure? I would assume 1 of those should be a group(?) – Rinzwind Jan 28 '17 at 19:44
wireshark is a group. – Pilot6 Jan 28 '17 at 19:44
but here you remove a user wireshark ;-) – Rinzwind Jan 28 '17 at 19:45
No, look into man deluser. – Pilot6 Jan 28 '17 at 19:45
deluser --group [options] group it says in my man You are misreading the manual: you need an option -G or --group for deluser to delete a group – Rinzwind Jan 28 '17 at 19:47
Look below. I use this command ant it works. – Pilot6 Jan 28 '17 at 19:48
+1 . . . or you could use gpasswd --delete <user> <group> which is less confusing I think – steeldriver Jan 28 '17 at 19:56

Undo usermod -a -G

1 Answers1