Can servers be synchronised to share the same configurations?

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http://unix.stackexchange.com – I have three VPS' running on separate hosts. They've had CentOS 5 installed on them at various points and I assume all run with slight variations of Webmin, PHP, MySQL etc. I've started to notice slight differences in how each server does tasks that are the same (eg, a Wordpress plugin might work on one VPS, but not on another - just as a general example). I'm still quite new to Linux and server admin, so clearly there's a lot to learn about housekeeping etc, but I'm quite happy that I've managed to get the servers up and running and serving pages! What I'm wondering, though, is whether or (HowTos)