Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

What does

2 * * * *

means in crontab context?

I want to run my program every 2 minutes; is that what 2 * * * * means?

share|improve this question

migrated from Feb 11 '10 at 7:05

This question came from our site for professional and enthusiast programmers.

Not quite; that means every 2nd minute of the hour (i.e., 6:02, 7:02, 8:02, etc.). To make it every 2 minutes, use */2 in the first entry:

*/2 * * * *

You can read more about the crontab syntax and available options here at Wikipedia. Ubuntu's got a good overview too.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.