Very Computer

1. Is cron && or is cron || ?

Colleagues
I forgot whether or not this can be done and could not find the answer in
the AIX man pages;
I have a job running every saturday:

10     3    *    *   6   /jobname

I need to change it so that it will run every last Saturday of the month; I
forgot whether or not this can be done;
Above format i believe is minute/hour/date/month/day am I correct?
Are the above parameters INCLUSIVE or EXCLUSIVE? i.e. are the cron fields
AND or OR values?
What I was thinking was running the job this way:

10  3   24,25,26,27,28,29,30,31 * 6 /jobname

In the case of a bitwise OR then I will have trouble because the damn thing
will run every 24th-31st as well as every Saturday and that means lots of
grief for us all and major problems
But if this is a bitwise AND it seems that only when a SAturday falls on
24-31 would this job run

Can anyone advise?
Thanks for helping with this
Joe

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