Adding_and_Removing_File_Entries

   Use the XAUTH ADD and XAUTH REMOVE commands to add entries to or
   delete entries from an X authority file.

   If you have created a display device (using the SET DISPLAY
   command), you can specify the device name on the xauth command
   line to insert or remove entries related to the display device.
   Typically, the X authority file entry for a display device
   corresponds to the display server specified by the SET DISPLAY
   command. However, if the SET DISPLAY command specifies that
   a proxy server be used, the file entry pertains to that proxy
   server.

   For example, the following X authority file has a single
   entry for the LOCAL transport on node ZEPHYR. To use the same
   authorization key for the DECnet transport and to specify
   that Kerberos be used when connecting to remote node HUBBUB,
   you could add the following entries to the X authority file
   UNTRUSTED.DECW$XAUTH:

   $  XAUTH -f UNTRUSTED.DECW$XAUTH
   Using authority file untrusted.decw$xauth

   xauth>  LIST
   local/ZEPHYR:0  MIT-MAGIC-COOKIE-1  cfcc5ef98f9718f90154f355c0ae9f62

   xauth>  ADD ::0 . cfcc5ef98f9718f90154f355c0ae9f62
   xauth>  ADD HUBBUB::0 MIT-KERBEROS-5 ""

   xauth>  LIST
   local/ZEPHYR:0  MIT-MAGIC-COOKIE-1  cfcc5ef98f9718f90154f355c0ae9f62
   decnet/ZEPHYR::0  MIT-MAGIC-COOKIE-1  cfcc5ef98f9718f90154f355c0ae9f62
   decnet/HUBBUB::0  MIT-KERBEROS-5

   xauth> EXIT
   Writing X authority file untrusted.decw$xauth

   Client applications running on systems in the same cluster
   share a single X authority file. As a result, in cluster
   configurations, adding an entry for the DECnet transport to the
   local system grants client applications running on other nodes in
   the cluster access to that system.

   To discontinue remote access to HUBBUB, you could use the XAUTH
   REMOVE command to remove the entry, as follows:

   $  XAUTH -f UNTRUSTED.DECW$XAUTH
   Using authority file untrusted.decw$xauth

   xauth> REMOVE HUBBUB::0
   1 entries removed

   xauth> LIST
   local/ZEPHYR:0  MIT-MAGIC-COOKIE-1  cfcc5ef98f9718f90154f355c0ae9f62
   decnet/ZEPHYR::0  MIT-MAGIC-COOKIE-1  cfcc5ef98f9718f90154f355c0ae9f62

   xauth> EXIT
   Writing X authority file untrusted.decw$xauth