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other:x_conf [2022/08/05 09:00] jypeter Improved |
other:x_conf [2022/08/05 13:35] jypeter [Troubleshooting] Added the "Nothing works" section |
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===== Testing ===== | ===== Testing ===== | ||
- | * Check if the ''DISPLAY'' variable is defined | + | The idea is to: |
- | * You should get something similar to the following if you are connected with ''ssh -X'' or ''ssh -Y''\\ <code>$ echo $DISPLAY | + | * Open a terminal and check that the ''DISPLAY'' environment variable is correctly defined on the local machine |
- | localhost:68.0 | + | * Connect to the remote machine |
- | </code> | + | * Check that a (new) ''DISPLAY'' variable is defined on the remote machine |
- | * You should get something similar to the following if you are using WSL\\ <code>$ echo $DISPLAY | + | * Check that you can start an application using graphics (e.g. ''xterm'') on the remote machine |
- | SOMETHING | + | |
- | </code> | + | ==== On a Linux computer ==== |
- | * Otherwise, type ''export DISPLAY=localhost:0.0'' | + | |
- | * Type ''xterm'' and check that a new //xterm// terminal appears (it may appear //iconified//) | + | Some basic commands in a terminal |
- | * FIXME | + | |
+ | <code>[Local] $ hostname | ||
+ | name_of_your_local_machine | ||
+ | |||
+ | [Local] $ echo $DISPLAY | ||
+ | :0 | ||
+ | |||
+ | [Local] $ ssh -X some_login@some_remote_server | ||
+ | [some connection information skipped here] | ||
+ | |||
+ | [Remote] $ hostname | ||
+ | name_of_the_remote_server | ||
+ | |||
+ | [Remote] $ echo $DISPLAY | ||
+ | localhost:20.0 | ||
+ | |||
+ | [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 | ||
+ | |||
+ | <code>PS C:\> $env:computername | ||
+ | name_of_your_local_machine | ||
+ | |||
+ | PS C:\> $env:DISPLAY | ||
+ | PS C:\> $env:DISPLAY="localhost:0" | ||
+ | PS C:\> $env:DISPLAY | ||
+ | localhost:0 | ||
+ | |||
+ | PS C:\> ssh -Y some_login@some_remote_server | ||
+ | Warning: No xauth data; using fake authentication data for X11 forwarding. | ||
+ | [some connection information skipped here] | ||
+ | |||
+ | [Remote] $ hostname | ||
+ | name_of_the_remote_server | ||
+ | |||
+ | [Remote] $ echo $DISPLAY | ||
+ | localhost:19.0 | ||
+ | |||
+ | [Remote] $ xterm</code> | ||
+ | |||
+ | |||
+ | ==== On a Windows computer with PuTTY and an X server installed ==== | ||
+ | |||
+ | We assume here that [[other:putty_conf|PuTTY is already installed and configured]] | ||
+ | |||
+ | We just have to open a pre-configured //Session// on a remote server | ||
+ | <code>[Remote] $ hostname | ||
+ | name_of_the_remote_server | ||
+ | |||
+ | [Remote] $ echo $DISPLAY | ||
+ | localhost:19.0 | ||
+ | |||
+ | [Remote] $ xterm</code> | ||
+ | |||
+ | |||
+ | ==== On a Windows computer with WSL+Linux and an X server installed ==== | ||
+ | |||
+ | |||
+ | * FIXME ''export DISPLAY=localhost:0.0'' | ||
===== Troubleshooting ===== | ===== Troubleshooting ===== | ||
+ | ==== Nothing works! ==== | ||
+ | |||
+ | That's unfortunate, but: | ||
+ | * Have you turned on your computer? | ||
+ | * Do you have network access, and an account on a remote server? | ||
+ | * Have you run the [[other:x_conf#testing|Tests]]? | ||
+ | * Have you installed and configured the //X server// correctly? Is it really running? | ||
+ | * Have you configured [[other:putty_conf|PuTTY]] and/or other required applications correctly ? | ||
+ | * Is the ''DISPLAY'' variable defined correctly on the local and remote computer? | ||
==== OpenGL related settings ==== | ==== OpenGL related settings ==== | ||