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I bet he has "ls" also. The question is, "what's your point"?

If it is not necessary, don't install it. Rsync or scp is probably "good enough" for production.

Apparently not if you want to include the git commit id in your HTTP headers :)

But git will let you do a diff to see if someone made manual changes.

You can create a file with your git commit id in your deployment script and have it run on your source control box.