Your JoeDog’s Fido was selected by Profit Bricks as its 24th Best Free Sysadmin Tool. 

About Fido:

A multi-threaded file watch utility, Fido can monitor a file or directory to see if its modification time changed, and it’s intuitive enough to recognize a change even if the daemon was down at the time of the change. Written for RedHat Enterprise Linux, Fido should run in all Linux flavors, and the source bundle contains RedHat init.d scripts for users’ convenience.

Key Features:

• Content changes can be recognized with regular expression pattern matches
• Monitors files for changes in content or modification times
• It will kick off a user-defined script when it notices a change
• Coded to POSIX 1003.1 standards