[sclug] cron expression

Jonathan H N Chin jc254 at newton.cam.ac.uk
Tue Jan 23 16:39:14 UTC 2007

darren wrote:
> Is it possible to create a single cron expression (for vixie cron) that
> specifies the penultimate day of the month?

If you have GNU date on your path:

	MM HH * * * [ `date -d+2day +%d` = 1 ] && MYSCRIPT

Fill in MM, HH and MYSCRIPT as appropriate.

You could give DoM as "28,29,30,31" but it hardly seems worth it.


Jonathan H N Chin, 2 dan | deputy computer | Newton Institute, Cambridge, UK
<jc254 at newton.cam.ac.uk> | systems mangler | tel/fax: +44 1223 767091/330508

                "respondeo etsi mutabor" --Rosenstock-Huessy

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