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The cron command-line utility is a job scheduler on Unix-like operating systems. Users who set up and maintain software environments use cron to schedule jobs[1] (commands or shell scripts), also known as cron jobs,[2][3] to run periodically at fixed times, dates, or intervals.[4] It typically automates system maintenance or administration—though its general-purpose nature makes it useful for things like downloading files from the Internet and downloading email at regular intervals.[5]

Quick facts: Developer(s), Initial release, Written in, Op...
Developer(s)AT&T Bell Laboratories
Initial releaseMay 1975; 47 years ago (1975-05)
Written inC
Operating systemUnix and Unix-like, Plan 9, Inferno
TypeJob scheduler

Cron is most suitable for scheduling repetitive tasks. Scheduling one-time tasks can be accomplished using the associated at utility.

Cron's name originates from chronos, the Greek word for time.[6][better source needed]

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