Recursive cron job?

[heldmar]

Hi,

I'm looking to do a recursive cron job, what I mean is: I need a job to be executed every 4 days.

I don't know how to start this, because what I have read in the man crontab and in the net is that you set a job for a determined hour, minute, second or even day of the week, but you can set it for every xx amout of minutes, hours, days.

Any help on this?

Thanks!

[valan]

From the crontab man page:

Step values can be used in conjunction with ranges. Following a range with ``/<number>'' specifies skips of the number's value through the
range. For example, ``0-23/2'' can be used in the hours field to specify
command execution every other hour (the alternative in the V7 standard is
``0,2,4,6,8,10,12,14,16,18,20,22''). Steps are also permitted after an
asterisk, so if you want to say ``every two hours'', just use ``*/2''.

Sounds like you can put */4 in the day of month field and it will run it every 4 days.

[heldmar]

Thanks Valan, well, that&#180;s exacttly what I did, I settet it up like this:

15 3 * * */4 <script to run>

So, it should run at 03:15 (AM) every 4 days.

Let&#180;s see in 4 days if it works.