Differences

This shows you the differences between two versions of the page.

--- 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
@@ Line 2: / Line 2: @@
 ----
 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

Trace: