2016-12-14 - I no longer use this package since it does not work across upgrades. When you update the script the lock goes with the inode not the script. I now use Lazy::Lockfile. I plan to switch to systemd when we move to el7.
2011-10-29 - I think this package is great. Adding just one line gets you up and running. If you run crons against a database, there is no easier way to ensure that you never walk on yourself.