10.9. The Scheduled Commands Module
At jobs (called Scheduled Commands by Webmin) are similar to Cron jobs, but instead of executing repeatedly on a schedule, they run only once at a specified date and time. Unlike Cron jobs, they can be configured to execute in a specific directory instead of the user's home directory. Scheduled commands also keep track of the environment variables that were set when they were created, and make them available to the command when it runs.
Normally the at command is used to create At jobs, the atq command is used to list them, and the atrm command is used to remove them. On Linux, the directory /var/spool/at is used to store jobs—one per file. The daemon process atd, which runs all the time in the background, ...
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