UNIX Basics: JOB SCHEDULING
"Succinctly stated, cron's role is to spawn jobs in accordance with the passage of time. cron itself is normally started at boot time when the system switches to multiuser operation and once started, never stops unless it is manually killed or the system is halted. cron is slaved to the system clock and awakens at one minute intervals to start scheduled jobs (which are referred to as cron jobs)."
(Submitted by Noel Tue May 25, 2004 )
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