13.6 ExercisesThe cron daemon runs shell commands at specified dates and times. The AIX cron daemon is similar to the System V Release 2 cron daemon. An entry in the /etc/inittab file starts the cron daemon at system initialization.
Regularly scheduled commands can be specified according to instructions contained in the crontab files. You can submit your crontab file with the crontab command. Use the at command to submit commands that are to be run only once. You can also use the batch command that is a shell script invoking the at command.
14.1 The at
Command