How to execute a command at a particular time in

"at" is quite a useful command in linux — but not many people use it.

 Some points to note

/etc/init.d/atd start (to start the at daemon)

at -l (to list the pending commands)

at -r (to remove a scheduled command)

Useful link : http://www.computerhope.com/unix/uat.htm

Example:

at 14:49 -f /tmp/b.sh

Just make sure that b.sh is executable.