Shutdown Linux Server With Shutdown Account

by on November 18, 2004 · 5 comments· LAST UPDATED December 28, 2009

in , ,

Have you ever wondered why shutdown account exists on Linux server, especially under Red Hat Enterprise Linux distribution? The answer is quite simple - shutdown account can shutdown server. Here is how you can enable the shutdown account:

1) Login as a root user .

2) Setup password for the shutdown account:
# passwd shutdown

2) Add access to shutdown –h now via sudo:
# visudo
Put any one of following line in your sudo configuration file:
shutdown ALL=/sbin/shutdown –h now
OR
shutdown localhost=/sbin/shutdown –h now

Note that localhost will only allow sudo from local terminal. For network based shutdown make sure you use ALL or an IP address or a domain name, for complete syntax refer sudo(8), and sudoers(5) command man page.

4) Save and close the file.

5) Change the shutdown shell:
# vi /etc/passwd
Replace existing shell entry (/sbin/shutdown) to
/usr/bin/sudo /sbin/shutdown –h now

Chang text from:
shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown
to:
shutdown:x:6:0:shutdown:/sbin:/usr/bin/sudo /sbin/shutdown –h now

6) Close and save the file.

7) Test it by login into system with shutdown username and password.

8) Please, note down that sudo will prompt for password. If you wish to get rid of this issue use NOPASS option in sudo configuration file.

9) Alternatively, you can use the sudo command only to achieve the same effect. This simple hack ensures that ordinary user can shutdown system without touching other part of the system.

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{ 5 comments… read them below or add one }

1 judy kitces April 26, 2007 at 4:33 pm

i tried implementing this and i got the following error messages when i tried logging in at the console with user shutdown:

gdm_slave_session_start: Directory /sbin/.gnome2 does not exist
gdm_auth_user_add: /sbin is not owned by uid 6.

i am running RHE3. please advise! thanks!

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2 nixCraft April 26, 2007 at 8:52 pm

This is for shell access, for GUI there is inbuilt facility to shutdown server/workstation.

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3 Philippe December 26, 2009 at 3:01 pm

Hi Vivek,
Informative topic, thanks.

Typo here:
visod
should read:
visudo

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4 nixCraft December 28, 2009 at 2:40 pm

Thanks for the heads up!

Reply

5 goldenfox June 21, 2011 at 9:17 am

Hi Vivek,

I tried it in CentOS 5.6 machine and I encountered this error:

server sshd[3890]: User shutdown not allowed because shell /usr/bin/sudo /sbin/shutdown -h now does not exist

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