Re: crontab 4th Tuesday of month

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On 07/29/2012 02:33 PM, Charlie Brune wrote:
On 07/28/2012 08:20 AM, Tony Molloy wrote:
On Saturday 28 July 2012 12:03:09 Frank Murphy wrote:
15 18 22-28 * 2 /command

I thought the last tuesday would be covered by above.
But it has run everyday since 22nd.

Have googled a bit:
http://hintsforums.macworld.com/showthread.php?t=25110
plus other crontab pages.


http://hintsforums.macworld.com/member.php?s=2584787478dc5ab0791da9
ba8d650aa5&u=28924 15 18 22-28 * * test 'date +\%a' != Tue ||
/command
Am uncertain if above would work ootb.

man crontab (22 September 2010) doesn't shed light on this.

Try the following

eg. this picks out the first sunday of the month

07 03 1-7 * * test `date +\%a` = Sun && /usr/local/bin/backup-full

So

15 18 22-28 * * test 'date +\%a' = Tue && command

Tony
Not sure if your syntax will work. If it doesn't, here's what has worked
for me:

23 1 22-28 * * [ `date +\%a` == "Tue" ] && /usr/local/bin/my-script

Charlie

If you are firing off a script with this why don't you build the logic into the script? Let cron fire off the script every Tuesday. The script can determine if it's the correct Tuesday and take whatever action you want if it is or exit if it isn't.

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