Merge branch 'xfix' into 'master'

Xfix

See merge request !165

docs.it4i/general/accessing-the-clusters/graphical-user-interface/x-window-system.md

@@ -15,7 +15,11 @@ In order to display graphical user interface GUI of various software tools, you
 
 ## X Display Forwarding on Windows
 
-On Windows use the PuTTY client to enable X11 forwarding. In PuTTY menu, go to Connection-SSH-X11, mark the Enable X11 forwarding checkbox before logging in. Then log in as usual.
+On Windows use the PuTTY client to enable X11 forwarding. In PuTTY menu, go to Connection-SSH-X11, mark the Enable X11 forwarding checkbox before logging in.
+
+![](../../../img/cygwinX11forwarding.png)
+
+Then log in as usual.
 
 To verify the forwarding, type
 
@@ -130,27 +134,3 @@ In this way, we run remote gnome session on the cluster, displaying it in the lo
 
 Use System-Log Out to close the gnome-session
 
-### if No Able to Forward X11 Using PuTTY to CygwinX
-
-```console
-[usename@login1.anselm ~]$ gnome-session &
-[1] 23691
-[usename@login1.anselm ~]$ PuTTY X11 proxy: unable to connect to forwarded X server: Network error: Connection refused
-PuTTY X11 proxy: unable to connect to forwarded X server: Network error: Connection refused
-
-  (gnome-session:23691): WARNING **: Cannot open display:**
-```
-
-1. Locate and modify Cygwin shortcut that uses [startxwin](http://x.cygwin.com/docs/man1/startxwin.1.html)
-    locate
-    C:cygwin64binXWin.exe
-    change it
-    to
-    C:_cygwin64binXWin.exe -listen tcp_
-
-![XWin-listen-tcp.png](../../../img/XWinlistentcp.png "XWin-listen-tcp.png")
-
-1. Check Putty settings:
-     Enable X11 forwarding
-
-    ![](../../../img/cygwinX11forwarding.png)