AT(1) General Commands Manual AT(1)
NAME
at, atrun - execute commands at a later time
SYNOPSIS
at time [month day] [file]
EXAMPLES
at 2315 Jan 31 myfile
# Myfile executed Jan 31 at 11:15 pm
at 0900 # Job input read from stdin
at 0711 4 29 # Read from stdin, exec on April 29
DESCRIPTION
At prepares a file to be executed later at the specified time by creating a special entry in /usr/spool/at. The program atrun should be
started periodically, for example, every minute by cron. Atrun checks to see if any files in /usr/spool/at should now be run, and if so,
it runs them and then puts them in /usr/spool/at/past. The name of the file created in /usr/spool/at by at is YY.DDD.HHMM.UU (where YY,
DDD, HH, and MM give the time to execute and UU is a unique number). Note that when the command runs, it will not be able to use stdin or
stdout unless specifically redirected. In the first example above, it might be necessary to put >/dev/log on some lines in the shell
script myfile. The same holds for the commands typed directly to at.
SEE ALSO
cron(8).
AT(1)
