The at command uses the following syntax

at HH:MM MMDDYY
>command to run
>CTRL+D

e.g.

at 06:45 091014
>/bin/ks > /var/tmp/ls.out
>CTRL+D

At 06:45AM on the 9h October 2014, the ls command will run

• at -l will list at commands waiting to run

• atrm jobid will delete the at command waiting to run with the specified jobid