• /usr/bin/say Speak the arguments out loud, e.g. % say hello world
  • /sbin/md5 Calculates a message digest checksum for a file, e.g. % md5 foo.gif
  • /usr/bin/cpan Grab and install CPAN module. e.g. % sudo -H cpan -i LWP::Protocol
  • /usr/bin/xmllint. Test XML file integrity, pretty print and more. e.g. % xmllint –format foo.xml