[systemd-devel] Timer: time format

[Mikhail Kasimov]

23.08.2016 16:55, arnaud gaboury пишет:
> On Tue, Aug 23, 2016 at 3:52 PM, arnaud gaboury
> <arnaud.gaboury at gmail.com> wrote:
>> On Tue, Aug 23, 2016 at 3:39 PM, Michael Chapman <mike at very.puzzling.org> wrote:
>>> On Tue, 23 Aug 2016, 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.
>>>
>>> You may find it more convenient to use the other On* directives.
>>>
>>> For example:
>>>
>>>    OnBootSec=1h
>>>    OnUnitActiveSec=12h
>> Thank you for all these answers. In fact, without having a look at my
>> emails, I finally found this solution (which is correct accordingly
>> what I read):
>> OnUnitActiveSec=12h
>>
>> Do I have to add:
>> Persistent=true
> NO

"Persistent=true" is needed, when critical task executing was missed in some reason. By default Persistent=no, so, you may not to specify it in your .timer file explicitly. Otherwise, yes, you need to specify Persistent=true
  in your .timer file explicitly.



>
>> and an OnBootSec entry ?

It's useful, if you wish to execute your task, when computer (server) is 
after reboot or being off.

>>
>>
>>> will trigger the associated service an hour after booting the system, and
>>> every 12 hours therafter. Take a look at the RandomizedDelaySec= and
>>> AccuracySec= directives too, to further specify how accurate the timer
>>> should be.
>>>
>>> - Michael
>>
>>
>> --
>>
>> google.com/+arnaudgabourygabx
>
>