Linux Journal: Take Command — cron: Job Scheduler

“Have you ever wandered near your Linux box in the middle of the
night, only to discover the hard disk working furiously? If you
have, or just want a way for some task to occur at regular
intervals, cron is the answer.

“The cron daemon, crond, packaged with most Linux
distributions, controls scheduling of regularly occurring

“I have provided a brief introduction to the cron facility, a
typical part of Linux and other UNIX operating systems. It will
provide a starting point for time-related work you want your Linux
system to perform. In brief, if you want to schedule repetitive
tasks so as not to type the same commands again and again, use