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Today I bumped into this project. Seems this software has been designed to help LEB collectors like us. We can now issue one single command to update all our "Idle" LEBs and do other tasks from one server.
From their website-
With (R)?ex you can manage all your boxes from a central point through the complete process of configuration management and software deployment.
A word of caution: I didn't get time to explore this software. I'm posting here hoping others would find it useful. Use it at your own risk!