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Does cron run missed jobs?
A CronJob is counted as missed if it has failed to be created at its scheduled time. If the CronJob controller happens to be down from 08:29:00 to 10:21:00 , the job will not start as the number of missed jobs which missed their schedule is greater than 100.
Do cron jobs run when computer off?
If the system is turned off or asleep, cron jobs do not execute; they will not run until the next designated time occurs. If you schedule a launchd job by setting the StartCalendarInterval key and the computer is asleep when the job should have run, your job will run when the computer wakes up.
How accurate is the cron?
Computers are no different. If cron is designed to work at a resolution of one-minute intervals, then generally, the generic accuracy is 30 seconds. Yet cron typically runs within milliseconds of programmed schedule. The actual trigger is the kernel schedulers and timers.
What happens if you miss a cronjob in fcron?
Vixie-cron will just skip cronjobs that were missed. fcron will run missed crons as soon as it can. IIRC it is based on vixie-cron as well, so if that is what you’re looking for you might want to check out fcron.
What happens if you shutdown while cron jobs are running?
If you shutdown while the cron jobs are running, the system shuts down and the cron jobs stop (or don’t run). One alternative you can check into is anacron. Really depends on the cron deamon you’re running. Vixie-cron will just skip cronjobs that were missed. fcron will run missed crons as soon as it can.
Where do I find the list of cron jobs?
How to List all Active Cron Jobs Running. To list all scheduled cron jobs for the current user, enter: crontab –l. Cron jobs are typically located in the spool directories. They are stored in tables called crontabs. You can find them in /var/spool/cron/crontabs.
Where are cron jobs stored in the spool directories?
Cron jobs are typically located in the spool directories. They are stored in tables called crontabs. You can find them in /var/spool/cron/crontabs. The tables contain the cron jobs for all users, except the root user. The root user can use the crontab for the whole system.