What is the correct syntax to run cron every 4 hours? [duplicate]

0 0,4,8,12,16,20 * * * /cmd.sh

That’s probably how I would do it. This will run the job every 4 hours, on the hours of 00:00, 04:00, 08:00 12:00, 16:00, 20:00.

This is just a little more verbose way of writing */4, but it should work the same.

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