On Tue, Aug 23, 2016 at 11:38:57AM +0200, arnaud gaboury wrote: > I am really sorry for this post as this may sound like a trivial one, > but honestly the timer topic is difficult to understand for me (at > least the time format). > > I am looking to run a service twice a day, never mind the time. I > understand I must use OnCalendar, but I have no idea for the rest. > > I was thinking of OnCalendar=*:12:00 for running every 12 hours. Is > it right (or will it run every day at noon) ?
This runs every hour on the 12 minute mark. You want '0,12:00' to run on the 0 hour and 1200. Alternatively, you can always use multiple OnCalendar= entries if that's easier for you to grok. With less than 100 lines of code, one could write a tool which parses calendar specs and spits out nice human-readable times for the next N occurrences. Something like: $ systemd-timespec-parse --next=5 0,12:00 Showing next 5 runs for: *-*-* 00,12:00:00 1: Tue 2016-08-23 12:00:00 EDT 2: Wed 2016-08-24 00:00:00 EDT 3: Wed 2016-08-24 12:00:00 EDT 4: Thu 2016-08-25 00:00:00 EDT 5: Thu 2016-08-25 12:00:00 EDT Maybe this would save people some time... I know I'd make use of this. d _______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/systemd-devel
