Please stop to enforce to move /bin/bash and/or /bin/csh or /bin/tcsh to /usr/bin/ ... I do not agree with this. It is rather useless to move essential user command binaries (for use by all users) from /bin/ to /usr/bin/ and link them back to /usr/bin/ http://refspecs.linuxfoundation.org/FHS_3.0/fhs-3.0.html#binEssentialUserCommandBinaries