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CTL is part of the ControlTier Project

CTL is a distributed command dispatching tool. CTL provides the missing development framework for people who need to automate the management of software services or automate any other IT task that spans multiple machines. It helps you avoid the drudgery and complexity of scripting distributed and coordinated actions, letting you focus on your administrative "business logic".

All of the CTL docs can now be found on the ControlTier Wiki. You can start here:
http://apps.sourceforge.net/mediawiki/controltier/index.php?title=Command_execution