I am using Ubuntu 11.04. I want to run a script which checks for a running process and shuts down the system when that process ends. To do this, the user requires shutdown access so that the script may be executed without requiring a password.

I referred to this page and added the text in my sudoers file. However, it's still asking me the password whenever I execute sudo shutdown -h now. Also, I get an error saying root privileges are required, when I execute shutdown without sudo.

My sudoers file looks something like this.

# Cmnd alias specification

Cmnd_Alias      SHUTDOWN = /sbin/shutdown



# User privilege specification

root    ALL=(ALL:ALL) ALL

myusername    ALL = NOPASSWD: SHUTDOWN

How can I give permission to a user to execute the shutdown command without having to manually enter the password?

Thanks.