Poweroff Ubuntu without sudo, without password, over SSH

Asked Dec 14 '18 at 07:50

Active Dec 14 '18 at 07:50

Viewed 5,921 times

I have Ubuntu 18.04.1 LTS and trying to execute "poweroff" as a sudoer but without needing to enter the password.

I added this line to visudo:

nurp    ALL = NOPASSWD: /sbin/poweroff

It gives this error:

nurp@nurp-OptiPlex-7040:~$ poweroff
Failed to set wall message, ignoring: Interactive authentication required.
Failed to power off system via logind: Interactive authentication required.
Failed to open /dev/initctl: Permission denied
Failed to talk to init daemon.

I tried sudo poweroff -f but then it asks for password. I just want to run a long script and poweroff after it finishes. I don't want to type password on the command line.

asked Dec 14 '18 at 07:50

nurp

1

have you tried all alternatives here ? https://ubuntuforums.org/showthread.php?t=963124 – John Joe Dec 14 '18 at 08:10
Interesting because your line looks correct, and I replace nurp with alvin it works here. – Alvin Liang Dec 14 '18 at 08:11
This is the correct syntax - maybe you have some other error in your sudores file? you can check as root with 'visudo -c' – Robert Riedl Dec 14 '18 at 08:26
I don't need root privileges to use the poweroff-command. – mook765 Dec 14 '18 at 08:27
@mook765 In the console, yes, but the original poster connects through ssh. – Alvin Liang Dec 14 '18 at 08:42
@RobertRiedl It's unlikely he has other syntax error, because he uses visudo and will reject it. – Alvin Liang Dec 14 '18 at 08:43
@AlvinLiang, right ! I didn't catch that. – Robert Riedl Dec 14 '18 at 08:44
1

setting the sticky bit works also sudo chmod a+s /sbin/poweroff – ptetteh227 Dec 14 '18 at 10:28
1

There's a difference between running poweroff at a console vs. via SSH: See https://askubuntu.com/a/1005914/19626. While a different question, it's the same answer. – user535733 Dec 14 '18 at 13:04
@user535733's link was the correct duplicate for my question. Could someone edit the link above the question? I can't do it somehow. – nurp Dec 14 '18 at 19:54

Poweroff Ubuntu without sudo, without password, over SSH

0 Answers0