EXAMPLES

 To get a file listing of an unreadable directory:

        $ sudo ls /usr/local/protected

 To list the home directory of user yazza on a 
 machine where the file system 
 holding ~yazza is not exported as root:

        $ sudo -u yazza ls ~yazza

 To edit the index.html file as user www:

        $ sudo -u www vi ~www/htdocs/index.html

 To shutdown a machine:

        $ sudo shutdown -r +15 "quick reboot"

 To make a usage listing of the directories in the /home partition. 
 Note that this runs the commands
 in a sub-shell to make the cd and file redirection work.

        $ sudo sh -c "cd /home ; du -s * │ sort -rn > USAGE"

Sudoers File

http://www.go2linux.org/sudoers-how-to