too long

Question

I've got a bunch of php scripts scheduled to run every couple of minutes in cron on a CentOS machine. I would like for every script to self check if the previous instance of it is still running when it starts and stop if it is.

Answer 1

You can add to your PHP script a simple echo at the end (maybe with date()) which will be visible in your cron logs and shows you if the script reaches the end (and then finish its task)