Schedule a command for twice daily with cron?
 

OK, I have a very quick question. I have Logwatch running once a day with cron, how do I set it up to run twice a day?

This is just purely an example, but you will see that this is a cron entry that will run at 6:30AM and then 3:30PM (15 is 3 in military time). Just comma seperate the hours, or comma seperate whatever section of the cron.

just put two values in the second column, e.g. "0 3,15 * * * command" would run at 3am and 3pm

OK, I took the 0logwatch script from /etc/cron.daily and I put in a new directory called /etc/cron.twice_daily.
Then I added "0 5,17 * * * root run-parts /etc/cron.twice_daily" in my crontab and restarted cron.

That should work, right? This is the first time I've ever really used cron.

Thanks for the help.

yub, so at 5:00AM and 5PM your going to run ;)

Excellent :)

Does "*/12" work?
 

Can't you use "*/12" to mean "every 12 hours"?

yes, but he wanted 5pm, not midnight and noon.

Note this thread is SEVEN YEARS OLD. The specific question is no longer relevant.