Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

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

My crontab runs a cron every 5 minutes... If the cron needs more than 5 minutes to run, can this be a problem?? Can the problem be with the commands the cron runs?

Thanks for your answer ;-)

share|improve this question

cron should have no problem running your task again even though the first one isn't finished.

Although, a problem could arise depending on the commands you are running (i.e. if they both write to the same file)

share|improve this answer
If having two instances of the script running concurrently is an issue, you want to use a lockfile - or things like pgrep to check if another instance is running - to either make the second instance wait or quit, if it detects another instance is running. – LawrenceC Sep 5 '12 at 11:03

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .