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talk:howtos:general_admin:task_scheduling [2012/12/25 05:27 (UTC)]
mfillpot added a note
talk:howtos:general_admin:task_scheduling [2016/01/05 11:01 (UTC)] (current)
pdi dcron
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 ---- ----
 I have added the task of writing pages for cron, at and anacron to my task queue, I will hopefully get them completed soon. --- //​[[wiki:​user:​mfillpot|Matthew Fillpot]] 2012/12/24 21:26// I have added the task of writing pages for cron, at and anacron to my task queue, I will hopefully get them completed soon. --- //​[[wiki:​user:​mfillpot|Matthew Fillpot]] 2012/12/24 21:26//
 +----
 +Slackware uses dcron, which can be used for asynchronous cron.
 +
 +From dcron README, "In the author'​s opinion, having to combine a cron daemon with another daemon like anacron makes for too much complexity. So the goal is a simple cron daemon that can also take over the central functions of anacron."​
 +
 +It uses the notation @freq, eg. @hourly, @daily, etc, or the notation FREQ=, eg FREQ=1h, FREQ=1d, etc. (see man 1 crontab)
 +
 +The daily cron job, as found in Slackware'​s root crontab is
 +
 +''#​ Run daily cron jobs at 4:40 every day:''​
 +
 +''​40 8 * * * /​usr/​bin/​run-parts /​etc/​cron.daily 1> /​dev/​null''​
 +
 +which, for a host that is not continuously on, can become
 +
 +''#​ Run daily cron jobs whenever crond is running, and sees''​
 +
 +''#​ that at least one day has elapsed since it last ran''​
 +
 +''​@daily ID=cron_daily /​usr/​bin/​run-parts /​etc/​cron.daily 1> /​dev/​null''​
 +
 +Let it be noted that it works equally well at a cold boot or a resume from suspend or hibernate.
 +
 +---pdi 2016/01/05
 +
 +
 +

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