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                      4: XHOST(1)           UNIX Programmer's Manual             XHOST(1)
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                      8: NAME
                      9:      xhost - X window system access control program
                     10: 
                     11: SYNOPSIS
                     12:      xhost [+-]host ...
                     13: 
                     14: DESCRIPTION
                     15:      _X_h_o_s_t is used to add and delete hosts to the list of
                     16:      machines X will accept connections from.  This is an elemen-
                     17:      tary form of privacy control, since otherwise X would be
                     18:      willing to create windows for anyone on the internet.  It is
                     19:      only sufficient for a workstation (single user) environment,
                     20:      though it does limit the worst abuses.
                     21: 
                     22:      If you want to set up hosts that you always trust, you can
                     23:      specify them in your login file, or you can specify the
                     24:      hosts in the file /_e_t_c/_X*._h_o_s_t_s, where * is the number of
                     25:      the display on the machine.
                     26: 
                     27:      Specifying a host name (with an optional leading plus sign)
                     28:      adds that host to the list; use a leading minus sign to
                     29:      delete a host.
                     30: 
                     31:      DECnet nodes should be specified as names with trailing
                     32:      ``::''.
                     33: 
                     34:      This program can only be executed on the machine the display
                     35:      is connected to.
                     36: 
                     37:      It is possible to remove the current host from the access
                     38:      list. Be warned that you can't undo this without logging
                     39:      out.
                     40: 
                     41:      _X_h_o_s_t with no arguments will print the current hosts allowed
                     42:      to access your display.
                     43: 
                     44: FILES
                     45:      /etc/X*.hosts
                     46: 
                     47: SEE ALSO
                     48:      X(8C), xterm(1)
                     49: 
                     50: ENVIRONMENT
                     51:      DISPLAY   -    To find out which X you are using.
                     52: 
                     53: AUTHOR
                     54:      Copyright 1985 by Massachusetts Institute of Technology.
                     55:      See _X(_1) for a complete copyright notice.
                     56:      Bob Scheifler, MIT Laboratory for Computer Science, Jim Get-
                     57:      tys, MIT Project Athena (DEC).
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                     63: Printed 9/15/87          25 January 1986                       1
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