AT command is used to schedule/run a command at a later time, 1 hour later, 2 mins from now, 1 week later or one month later.

FORMAT
       at [-V] [-q queue] [-f file] [-mldrbvt] TIME
       at -c job [job...]
       atq [-V] [-q queue]
       atrm [-V] job [job...]
       batch [-V] [-q queue] [-f file] [-mv] [TIME]

DESCRIPTION
       at  and  batch read commands from standard input or a specified file which are to be executed at a later time, using /bin/sh.

atq     lists the user's pending jobs, unless the user ... Read more »