[Solved] Cron execute program on first wednesday on month

[gaijin]

Hello
I want set cron to execute program on first wednesday on month
I try:

Code: Select all

cat /etc/crontab 
30 13 1-7 * 3   root    script.sh

but http://cron.schlitt.info say:
2017-12-01 13:30:00
2017-12-02 13:30:00
2017-12-03 13:30:00
2017-12-04 13:30:00
2017-12-05 13:30:00
2017-12-06 13:30:00
2017-12-07 13:30:00
2017-12-13 13:30:00
2017-12-20 13:30:00
2017-12-27 13:30:00

Someone have a idea

[pylkko]

Use a timer.

for example

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OnCalendar=Wed *-*-01..07 12:00:00

Would run every first - seventh day of the month at noon, but only if it is a Wednesday

see more in the manual:
https://manpages.debian.org/stretch/sys ... .5.en.html

You can add how ever many other conditions you want. Also, if the computer is off, it will run first when you turn it back on (if you want, that is. This cannot be done at all with cron). Or have it run on Wednesdays after 13:30 whenever the computer becomes idle.

[gaijin]

Code: Select all

30 9 * * 3 [ `date +\%d` -le 7 ] && /path/to/task/goes/here

This job will only run on Wednesdays and will exit if the Wednesday is not within the first seven days of the month. You can adjust the time, but this one fires off at 9:30am.

Hope this helps -

Perfectly. A man learns his whole life.