Is there an Open source tool to compare two different Unix environments?

My client deployed a Java-based application last week to production (and related libraries such as Oracle, ect.).  Beforehand, I was told that the production environment was set up identical to the test one.  It turned out that several jar files were missing, and that permissions were different on certain directories, and the profiles were slightly different.  Is there a tool available that can evaluate two different environments and compare not only directory structures, but also look for differences between the jars, differences between permissions, and differences in profiles, and so on?
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TintinConnect With a Mentor Commented:
rsync is what you are after.  It is generally used for synching directories, but you can use it in dry run option to compare files/directories.  It will report any differences in checksums, permissions, ownerships etc.
lhalkapeelAuthor Commented:
Thanks!  This is exactly what I was looking for.
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