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i'm looking for an alternative to Landscape, Spacewalk (for RHEL), or CTL to perform a specific job. I need to control and apply OS upgrades on ubuntu systems, for 100+ servers, and so far i wasn't that lucky. I've tried Approx tool (similar to apt-proxy), but it just caches the content, and what i really need to do is set update milestones, apply the upgrades to QA servers, validate, then Stage environment, and so on to Production. I hope I was clear enough, any answer will be much appreciated.