Simple Cron Question

[ChilliBoy]

Is this the right syntax for getting a cron job to run every 20 minutes?

*/20 * * * *

??

Cheers

[creole]

Explanation of field values:

* * * * * /home/user/domain-www/script_name

1 2 3 4 5 path to script

1 -- minute 00 - 59
2 -- hour of day 00 - 23 (midnight is 00)
3 -- day of month 01 - 31
4 -- month of year 01 - 12
5 -- day of week 01 - 07

------------------------------------------------------------------

This will run the cron every 15 minutes:

05,20,35,50 * * * * /home/user/domain-www/script_name

1 2 3 4 5 path to script

=>Note that you need double-digits if there is no * or /

------------------------------------------------------------------

This will run the cron 4 times a day - midnight, 6AM, Noon, and 6PM:

* 00,06,12,18 * * * /home/user/domain-www/script_name

1 2 3 4 5 path to script

[petesmc]

Yes that is correct, ChilliBoy

[viper420]

Can someone please explain to me what a cron job is? Thank you.

Viper420

[ChilliBoy]

Cheers!

[creole]

Viper...

Cron is a small Unix program that allows you to "schedule" the server to do specified things.

These are usually things like:
- Rotate images or content.
-Take a "snapshot" of a dynamic page

It's similar to the Windows Task Manager.