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"Ending company IT Admin relationship" has a good checklist for taking over an existing IT system, but I'm wondering as it relates to Linux:

  • What is the most effective way to assess the scope of existing custom configurations, installs, scripts, etc done?
  • Is there any software that will check if the kernel, system files, etc mirror the default files for the version installed?

At this point I don't know what distro of Linux the server (though using Netcraft I do know the server appears to be Linux) -- so it's possible without knowing that information that this would be a hard question to answer.

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up vote 4 down vote accepted

There's a tool called Blueprint which can reverse-engineer an existing system build. Modern package managers also have a means of checking the consistency of packages and displaying which binaries and configuration files have changed (rpm -vVa on RPM-based systems).

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