How do I make sure my bash script isn't already running?

Question

I have a bash script I want to run every 5 minutes from cron... but there\'s a chance the previous run of the script isn\'t done yet... in this case, i want the new run to j

Answer 1

Store your pid in mylockFile. When you need to check, look up ps for the process with the pid you read from file. If it exists, your script is running.