How to write a shellscript date check that will not To run Except 3rd week sat, Sunday and 4th week Monday of the month.

Question

E.g. the schellscript will not run on april 18, 19 and 20 and then for may is 16, 17 and 18 and so on

Thanks

Answer 1

You can get the weekday in numerical form from the date command using date "+%w". The output will be 0 for Sunday, 1 for Monday etc.

You can get the day of the month using date "+%d". Subtract one from that and divide by 7; that will give you how many complete weeks there have been in the current month.

From there, it's just a simple bunch of if/then statements. If you need more help actually implementing this, just ask.

Hope that helps!

Answer 2

I would advise to use cron for this kind of things, to separate the planned execution from what the script really does.

Have a look here on how to use cron.