Delegation of task: shutdown the system by non-root user.
When you have to give access to the folks from help desk to only shutdown the system, you can do so by following the procedure below.
1. Create a group/users for that particular group list. [ group=shutgroup, user=nocuser
# groupadd shutgroup
# adduser -G shutgroup nocuser
3. Allow the user and group to execute the shutdown permission by editing the sudoers file.
# vi /etc/sudoers #
adn add the following Line.
%shutgroup ALL=NOPASSWD:/sbin/shutdown
Now, any member of the group shutgroup will be able to shutdown the server.
To execute the command use as follows,
# sudo shutdown -h now
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