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I need the exact code that I would use because I'm not able to figure it out. I use crontab -e to set up a cron job but when I save it, it never works. I'm also just trying to run a file called newmail.sh from the root user.

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1 Answer 1

If you wanted the task to run every day at 3:17pm, you would use:

17 15 * * * root newmail.sh

This says "run newmail.sh as root every day of the week, every day of the month, every month at 3:17pm."

minute hour dom month dow user cmd

minute - This controls what minute of the hour the command will run on, and is between '0' and '59'

hour - This controls what hour the command will run on, and is specified in the 24 hour clock, values must be between 0 and 23 (0 is midnight)

dom - This is the Day of Month, that you want the command run on, e.g. to run a command on the 19th of each month, the dom would be 19.

month This is the month a specified command will run on, it may be specified numerically (0-12), or as the name of the month (e.g. May)

dow - This is the Day of Week that you want a command to be run on, it can also be numeric (0-7) or as the name of the day (e.g. sun).

user - This is the user who runs the command.

cmd - This is the command that you want run. This field may contain multiple words or spaces.

from: http://www.unixgeeks.org/security/newbie/unix/cron-1.html

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