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   echo "of the production software to be installed.  One might be the currently"
   echo "running software, one the previous software kept online as a fall-back,"
   echo "and one a new release of software which is scheduled to be brought"
   echo "online soon."
   echo
   echo "There are three usages of the prefix script:"
   echo
   echo "  (1) The interactive usage should be placed as the last line"
   echo "      of a user's ".profile".  The user must be running the"
   echo "      Korn shell (ksh) or the Bourne Again shell (bash)."
   echo "      The user is prompted to enter one of the known PREFIX locations,"
   echo "      specified in the \$HOME/.prefixes file or the /etc/prefixes file."
   echo "      During configuration, the \$PREFIX/.prefixrc file is sourced"
   echo "      in order to accomplish environment-specific configurations."
   echo "  (2) The non-interactive user configuration does not consult"
   echo "      \$HOME/.prefixes or /etc/prefixes or prompt the user, but merely"
   echo "      configures the environment in accordance with the cmd line argument."
   echo "  (3) The batch command usage is mainly for running commands from"
   echo "      cron or running commands in another environment without changing"
   echo "      to that environment."
   echo
   echo "Usage (1): . prefix                     (sets up environment)"
   echo "      (2): . prefix <prefix>            (non-interactive setup)"
   echo "      (3): prefix <prefix> <cmd> <args> (runs cmd configured for PREFIX)"
   echo
}