Is this the correct way for setting a cron job to run every 3 hours? After setting it this way, cron is executing the command every minute.

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3 Answers

Change Minute to be 0. That's it :)

Note: you can check your "crons" in

Example

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Change Minute parameter to 0.

You can set the cron for every three hours as:

0 */3 * * * your command here ..

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The unix setup should be like the following:

 0 */3 * * * sh cron/update_old_citations.sh

good reference for how to set various settings in cron at: