Scheduling Jobs for Automatic Execution
You can set up processes to run repeatedly, at specific times, without any human
intervention needed. Examples of such processes may be logfile analyzers,
network or security monitoring tools, filesystem maintenance jobs, and others.
To save you from having to run these jobs manually, the cron daemon can be set
to automatically run these types of processes at times you specify. Each
process will run as the user associated with the task.