cron jobs not done during sleep
wmoran at potentialtech.com
Mon Sep 17 08:31:08 PDT 2007
In response to "Steve Franks" <stevefranks at ieee.org>:
> Correct me if I'm wrong, but cron doesn't keep track of the last time
> something was done, does it? Which is to say if my system is crashed,
> was asleep, or powered off when a job is supposed to happen, it will
> not happen the next time the system is successfully operational, will
> it? It's not obvious to me for sure either way from any sources I've
> read (man crontab, google), and unix tends towards k.i.s.s. (which is
> why we like it)
> ...I understand why that would be important behavior if something
> would cause problems executed other than 9am on Mondays...
> Is there a tool or setting to implement this functionality? I want
> something to happen weekly, I don't care when. Assume I am off the
> commercial power grid and I'm not going to leave my system powered on
> just to make sure my backups get run. I use it when I need it, then I
> turn it off. More people should. Electricity is not free from a
> economic, social, or environmental perspective, and promises to be
> less so with time.
BSD's cron doesn't have this functionality.
The Linux folks have a cron-ish program that does recognize when jobs
have been missed and runs them at the earliest opportunity. I dislike
it, personally, but I can see where it's convenient in some circumstances.
It's in ports.
More information about the freebsd-questions