Differences

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--- other:x_conf [2022/08/09 15:26] – [If you are connecting with ssh or PuTTY] jypeter
+++ other:x_conf [2022/08/09 17:19] – [On a Windows computer with WSL+Linux and an X server installed] jypeter
@@ Line 114: / Line 114: @@
 Nothing special to do, if you are using [[other:ssh#using_an_x_server_to_display_graphics|"ssh -X" or "ssh -Y"]] or a [[other:putty_conf#changing_some_useful_settings|correctly configured PuTTY]] to connect to a remote Linux server
-==== If you are using WSL ====
+==== If you are using Windows Subsystem for Linux ====
-You need to know what you consider as the //Local machine//, and what is the //Remote server//
+In that special case, you will need the //X server// to display graphics [[other:x_conf#what_do_we_mean_exactly_with_local_and_remote_computers|from the local virtual machine and from remote computers]]
-  * **Local machine**: your local **Windows computer**, where you have installed [[other:win10wsl|WSL+Ubuntu]]
+You have to make sure that the ''DISPLAY'' variable is correctly [[other:win10wsl#configuration_in_your_local_linux_account|defined in the terminals used in WSL]]
+===== Testing =====
-  * **Remote server** : we consider 2 types of remote servers:
+==== Testing plan ====
-    * an **actual remote server**
-    * The **WSL computer** running on a **virtual machine inside your local Windows computer**. This can be considered as a different and //remote// computer, even it is running on the local computer\\ You need your local //X server// to display graphics generated in WSL
-    * **Define the ''DISPLAY'' variable** in the terminals used in WSL:
-      * //bash// shell: ''export DISPLAY=localhost:0.0''
-      * //tcsh// shell: ''setenv DISPLAY localhost:0.0''
-      * You probably want to define the ''DISPLAY'' variable automatically in one of the shell configuration files
-===== Testing =====
 The idea is to:
   * Open a terminal and check that the ''DISPLAY'' environment variable is correctly defined on the local machine
+    * If we use [[other:win10wsl|WSL]], we also check that we can start an application using graphics in ''WSL''
   * Connect to the remote machine
   * Check that a (new) ''DISPLAY'' variable is automatically defined on the remote machine
-  * Check that you can start an application using graphics (e.g. ''xterm'') on the remote machine
+  * Check that we can start an application using graphics on the remote machine
+Test application:
+  * We need a simple graphical application that is likely to be already installed on the remote machine
+    * The **test is declared successful** if we get a new window and we can interact with it.\\ Note: some applications may start with their window iconified, and you may have to check the part of your screen where the iconified windows go...
+    * Do not forget to **cleanly quit the test application** when you have checked that it seems to work
+    * It's enough to test one application
+  * ''xterm &'': the **recommended test application**. It will open a new terminal on the remote machine
+  * ''xeyes &'', ''xclock &'', ''gvim &'', ''gedit &'', ''eog &'', ''evince &'', ... : other //standard// applications, that may be installed (or not)
 ==== On a Linux computer ====
@@ Line 156: / Line 156: @@
 localhost:20.0
-[Remote] $ xterm</code>
+[Remote] $ xterm &</code>
 ==== On a Windows computer with only an X server installed ====
-We just open a ''Powershell'' window (''Start'' => ''Windows Powershell'' => ''Windows Powershell'') and type some basic commands
+We just open a ''Powershell'' window (''Start'' => ''Windows Powershell'' => ''Windows Powershell'') and type some basic commands, including the creation of a ''DISPLAY'' variable
 <code>PS C:\> $env:computername
@@ Line 180: / Line 180: @@
 localhost:19.0
-[Remote] $ xterm</code>
+[Remote] $ xterm &</code>
@@ Line 194: / Line 194: @@
 localhost:19.0
-[Remote] $ xterm</code>
+[Remote] $ xterm &</code>
 ==== On a Windows computer with WSL+Linux and an X server installed ====
-We assume that [[other:win10wsl|WSL+Ubuntu]] is installed and that the ''DISPLAY'' variable is [[other:x_conf#if_you_are_using_wsl|configured correctly]]
+We assume that [[other:win10wsl|WSL+Ubuntu]] is installed and that the ''DISPLAY'' variable is [[other:x_conf#if_you_are_using_windows_subsystem_for_linux|configured correctly]]
-Open a WSL terminal (you should know how, if you have installed WSL) and type some basic commands
+Open a //WSL// terminal (you should know how, if you have installed //WSL//) and type some basic commands
 <code>[Local WSL] $ hostname
 name_of_your_local_machine
 [Local WSL] $ echo $DISPLAY
 localhost:0.0
-[Local WSL] $ xterm
+[Local WSL] $ xterm &
 [Local WSL] $ ssh -X some_login@some_remote_server
@@ Line 214: / Line 216: @@
 [Remote] $ echo $DISPLAY
 localhost:22.0
-[Remote] $ xterm</code>
+[Remote] $ xterm &</code>
 ===== Troubleshooting =====