[CentOS] run script on cron job only run on first Saturdat every month???

Mon Aug 5 15:01:16 UTC 2013
Les Mikesell <lesmikesell at gmail.com>

On Mon, Aug 5, 2013 at 2:00 AM, Gordon Messmer <gordon.messmer at gmail.com> wrote:
> On 08/04/2013 10:17 PM, zGreenfelder wrote:
>> or... if it really has to be on the first Saturday and only on the first
>> Saturday,
>> then running something like
>> 15 4 1-7 * *  /home/app/oracle/backup/monthlybk.sh
>> with the top of the monthlybk.sh script doing soemthing like
> No, really.  We went over this.  You don't have to modify your scripts.
>   You can put the "test" in the crontab.  John's example should work
> properly:
> 15 04 * * 6    test $(date +"%d") -le 07 &&
> /home/app/oracle/backup/monthlybk.sh
> Cron will run those commands every Saturday.  On the first Saturday in
> the month, "test" will succeed and the script will be run.

On the other hand, putting the test in the script - perhaps with a
command line option to override - would also keep it from doing
something wrong even if someone happens to run it manually at the
wrong time.   If I were doing it, I might touch a file when starting
and check the timestamp of that to avoid running more than one even on
the right day.   Sometimes the most clever way isn't really the best.

   Les Mikesell
     lesmikesell at gmail.com