Yep. I use the flock tool (comes with most Linux distros, I assume) for this: flock -nx /var/run/myscript.lock /usr/bin/myscript This will run the script whil

Yep. I use the flock tool (comes with most Linux distros, I assume) for this: flock -nx /var/run/myscript.lock /usr/bin/myscript This will run the script while keeping a lock. If there is a lock, it will quit immediately.