Why can't I start a GUI program on the default `$DISPLAY` on a remote ssh server host?












0















I ssh to a remote host.



In the shell created by sshd on the remote host, why can't I start a GUI program on the default $DISPLAY



$ eog
Unable to init server: Could not connect: Connection refused

(eog:31542): Gtk-WARNING **: 23:11:16.793: cannot open display:

$ echo "$DISPLAY"

$


while specifying explicitly $DISPLAY=:0 creates a window on the remote host?



$ DISPLAY=:0 eog

(eog:31546): dbind-WARNING **: 23:11:42.415: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not provided by any .service files


Isn't :0 the default value of $DISPLAY?










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    0















    I ssh to a remote host.



    In the shell created by sshd on the remote host, why can't I start a GUI program on the default $DISPLAY



    $ eog
    Unable to init server: Could not connect: Connection refused

    (eog:31542): Gtk-WARNING **: 23:11:16.793: cannot open display:

    $ echo "$DISPLAY"

    $


    while specifying explicitly $DISPLAY=:0 creates a window on the remote host?



    $ DISPLAY=:0 eog

    (eog:31546): dbind-WARNING **: 23:11:42.415: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not provided by any .service files


    Isn't :0 the default value of $DISPLAY?










    share|improve this question



























      0












      0








      0








      I ssh to a remote host.



      In the shell created by sshd on the remote host, why can't I start a GUI program on the default $DISPLAY



      $ eog
      Unable to init server: Could not connect: Connection refused

      (eog:31542): Gtk-WARNING **: 23:11:16.793: cannot open display:

      $ echo "$DISPLAY"

      $


      while specifying explicitly $DISPLAY=:0 creates a window on the remote host?



      $ DISPLAY=:0 eog

      (eog:31546): dbind-WARNING **: 23:11:42.415: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not provided by any .service files


      Isn't :0 the default value of $DISPLAY?










      share|improve this question
















      I ssh to a remote host.



      In the shell created by sshd on the remote host, why can't I start a GUI program on the default $DISPLAY



      $ eog
      Unable to init server: Could not connect: Connection refused

      (eog:31542): Gtk-WARNING **: 23:11:16.793: cannot open display:

      $ echo "$DISPLAY"

      $


      while specifying explicitly $DISPLAY=:0 creates a window on the remote host?



      $ DISPLAY=:0 eog

      (eog:31546): dbind-WARNING **: 23:11:42.415: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not provided by any .service files


      Isn't :0 the default value of $DISPLAY?







      ssh x11 display






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited 5 mins ago







      Tim

















      asked 11 mins ago









      TimTim

      27.7k78265483




      27.7k78265483






















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