$ locate python | grep '\/python$\|\/python...$' | grep bin | xargs ls -alh
$ which scons
$ locate python scons | grep '\/python$\|\/python...scons$' | grep bin | xargs ls -alh
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The first command updates the locate database, the '''which''' commands show which version of Python and SCons will be executed if '''python''' or '''scons''' are typed at the prompt, and the locate commands will show all installed versions of Python and SCons.