here are some crontab examples: #Run command at 7:00am each weekday [mon-fri] 00 07 * * 1-5 mail_pager.script 'Wake Up' #Run command on 1st of each month, at 5:30pm 30 17 1 * * pay_rent.script #Run command at 8:00am,10:00am and 2:00pm every day 00 8,10,14 * * * do_something.script #Run command every 5 minutes during market hours */5 6-13 * * mon-fri get_stock_quote.script #Run command every 3-hours while awake 0 7-23/3 * * * drink_water.script

http://mkaz.com/ref/unix_cron.html

how to run crontab every 3 hours?

here are some crontab examples: #Run command at 7:00am each weekday [mon-fri] 00 07 * * 1-5 mail_pager.script 'Wake Up' #Run command on 1st of each month, at 5:30pm 30 17 1 * * pay_rent.script #Run command at 8:00am,10:00am and 2:00pm every day 00 8,10,14 * * * do_something.script #Run command every 5 minutes during market hours */5 6-13 * * mon-fri get_stock_quote.script #Run command every 3-hours while awake 0 7-23/3 * * * drink_water.script 07.12.13

http://mkaz.com/ref/unix_cron.html

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