>> If I have a 6 in the hour field of a crontab
  >> entry, does that mean the job will run only at 6am
  >> or will it run at 4pm too (16:00)?
  >> 
  >> I'm thinking 6am only. Do I understand this correctly?

  Kevin> if you put just a 6 in the hour field, then it
  Kevin> will only run at 6am. If you want it to run at
  Kevin> more than that hour, then you would do
  Kevin> something like:

  Kevin> * 6,14 * * * command <--- runs at 6am and 2pm

I believe as shown, this would every single minute from
6:00 to 6:59, and 14:00 to 14:49. If that's not the
intent, then substitute a 0 (or some other integer
representing minutes after the hour) for the first
asterisk.

-- 
Lynn David Newton
Phoenix, AZ