Cron

cron is a time-based job scheduler. A scheduled job is known as a ''cron job''. Although typically used to automate system maintenance and administration it can be used to automate any task. is most suitable for scheduling repetitive tasks as scheduling a one-time task can be accomplished via at.

The daemon name originates from Chronos, the Greek word for time.

cron is generally available on Unix-like operating systems. Provided by Wikipedia