other:x_conf
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other:x_conf [2022/08/09 15:35] jypeter [Testing plan] Added link to expected errors |
other:x_conf [2022/08/10 06:59] jypeter [Can't start a graphical application by clicking on its desktop shortcut] |
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| ====== Installing and configuring an X server ====== | ====== Installing and configuring an X server ====== | ||
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| + | <WRAP center round tip 60%> | ||
| + | This detailed and easy-to-understand page will help you **set up things correctly on your own**, and help you **understand what you are doing** | ||
| + | |||
| + | Or you can ask somebody to quickly configure everything for you, and keep on believing that things work by magic... | ||
| + | </WRAP> | ||
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| ===== What is an X server? ===== | ===== What is an X server? ===== | ||
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| * An //X server// **is** basically a program running on your **local** computer that understands the [[https://en.wikipedia.org/wiki/X_Window_System_core_protocol|X Windows System protocol]] used by **Linux computers** (**local** computer, or **remote** Linux servers) to generate graphics, and that can //render// (i.e. display) the graphics generated **remotely** on your **local** computer | * An //X server// **is** basically a program running on your **local** computer that understands the [[https://en.wikipedia.org/wiki/X_Window_System_core_protocol|X Windows System protocol]] used by **Linux computers** (**local** computer, or **remote** Linux servers) to generate graphics, and that can //render// (i.e. display) the graphics generated **remotely** on your **local** computer | ||
| + | * This page will mention a //''DISPLAY'' variable// several times: the X server needs this in order to know **where to display the graphics**! | ||
| ===== What do we mean exactly with Local and Remote computers? ===== | ===== What do we mean exactly with Local and Remote computers? ===== | ||
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| ===== Troubleshooting ===== | ===== Troubleshooting ===== | ||
| + | ==== Can't start a graphical application by clicking on its desktop shortcut ==== | ||
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| + | Check the shortcut and run the command directly in a terminal to check the error message | ||
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| + | There is a good chance that [[other:x_conf#error_when_there_is_no_x_server_running|you have forgotten to start the X server!]] | ||
| ==== Nothing works! ==== | ==== Nothing works! ==== | ||
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| * Is the [[other:x_conf#what_is_an_x_server|DISPLAY variable]] defined correctly on the local and remote computer? | * Is the [[other:x_conf#what_is_an_x_server|DISPLAY variable]] defined correctly on the local and remote computer? | ||
| - | === When DISPLAY is not defined correctly === | + | ==== Error when DISPLAY is not defined correctly ==== |
| If the ''DISPLAY'' **variable is not defined (correctly)**, you will get a ''Can't open display: //[NO VALUE DISPLAYED HERE]//'' error | If the ''DISPLAY'' **variable is not defined (correctly)**, you will get a ''Can't open display: //[NO VALUE DISPLAYED HERE]//'' error | ||
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| Make sure that you are using ''ssh -X'' or ''ssh -Y'', or that [[other:putty_conf#changing_some_useful_settings|PuTTY is configured]] with ''Enable X11 forwarding'' | Make sure that you are using ''ssh -X'' or ''ssh -Y'', or that [[other:putty_conf#changing_some_useful_settings|PuTTY is configured]] with ''Enable X11 forwarding'' | ||
| - | === When there is no X server running === | + | ==== Error when there is no X server running ==== |
| If the ''DISPLAY'' variable is defined, but there is **no X server**, you will get a ''Can't open display: localhost://[SOME VALUE]//'' error\\ <code>$ xterm & | If the ''DISPLAY'' variable is defined, but there is **no X server**, you will get a ''Can't open display: localhost://[SOME VALUE]//'' error\\ <code>$ xterm & | ||
other/x_conf.txt · Last modified: 2023/06/30 08:20 by jypeter
