Identify first Monday of the month

[jawon]

I'd like a script to complete only if it is the first Monday of the month. Can this be done in the crontab file or do I have to do an if/then within the script? If the latter, how?

 

[aigles]

With crontab you can specify thee day of week for the execution of a command, but not in th form of 'the first monday of the month'.

A solution :

In your crontab file specify the excution of you script on every Monday.

In your script add :

[ `date +%d` -gt 7 ] && exit

Jean Pierre.

 

[aigles]

You can also put all the 'logic' in the crontab file without modification in your script :

hour(s) minute(s) * * 1 [ `date +%d` -le 7 ] && your_script

Jean Pierre.

 

[SamBones]

It doesn't have to be that complicated. This will run a job at noon on only the first Monday of every month...

0 12 1-7 * 1 first_monday_script

Hope this helps.

 

[aigles]

No ! crontab will run the job the first seven days of the month AND every Monday

Jean Pierre.

 

[PHV]

I must agree with Jean-Pierre.
From my man page:
Note that the specification of days may be made by two fields
(day of the month and day of the week). If both are specified as
a list of elements, both are adhered to. For example, 0 0 1,15 *
1 would run a command on the first and fifteenth of each month,
as well as on every Monday. To specify days by only one field,
the other field should be set to `` * '' (for example, 0 0 * * 1
would run a command only on Mondays).

Hope This Help
PH.

 

[SamBones]

D'oh!

Yeah, you're right! My bad!

BTW, when are they going to fix that?