Use one or more of the following XAUTH commands to copy entries
    for a particular display from one X authority file to another.

    This enables you to use an existing entry to grant another user
    access to a particular display or to obtain access to a remote
    host from the current display device.

    o  EXTRACT - Creates a new X authority file whose entries match
       those in the original file.

    o  MERGE - Appends the contents of one file to another, replacing
       entries for the same display name or adding entries for
       different names.

    o  NEXTRACT and NMERGE - These commands are designed to be used
       with the PIPE command. NEXTRACT extracts file entries in a
       text format that can then be used as input for the NMERGE
       command.

       For example, the following command extracts the X
       authority file entry for the local transport from the file
       UNTRUSTED.DECW$XAUTH and adds it to a new X authority file
       NEW_XAUTHORITY.DECW$XAUTH:

       $  PIPE XAUTH -f UNTRUSTED.DECW$XAUTH NEXTRACT SYS$OUTPUT :0 | -
       _$ XAUTH -f NEW_XAUTHORITY.DECW$XAUTH NMERGE SYS$INPUT

    These commands can also be used with the rsh command to
    copy entries from an X authority file on an OpenVMS host to
    an X authority file on a remote UNIX system. For example,
    the following command extracts the entry for TCP/IP access
    (TCPIP/0:0) and adds it to the current file for user SMITH on
    the remote UNIX system FLOPSY:

    $  PIPE XAUTH -f UNTRUSTED.DECW$XAUTH NEXTRACT TCPIP/0:0 | -
    _$ rsh/user=smith/password=secret flopsy "xauth nmerge -"

                                   NOTE

       When using the PIPE and XAUTH commands to pass information
       to a UNIX host, you must press Ctrl/C to terminate the
       connection to the UNIX host and return control to OpenVMS.