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# Header | Header | 基本排版 | |
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1. Ordered List |
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- [ ] Todo List |
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> Blockquote | Blockquote |
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**Bold font** | Bold font | ||
*Italics font* | Italics font | ||
~~Strikethrough~~ | |||
19^th^ | 19th | ||
H~2~O | H2O | ||
++Inserted text++ | Inserted text | ||
==Marked text== | Marked text | ||
[link text](https:// "title") | Link | ||
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`Code` | Code |
在筆記中貼入程式碼 | |
```javascript var i = 0; ``` |
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:smile: | ![]() |
Emoji list | |
{%youtube youtube_id %} | Externals | ||
$L^aT_eX$ | LaTeX | ||
:::info This is a alert area. ::: |
This is a alert area. |
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Syncing
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Troubleshoot your MobaXterm X11 connection to UPPMAX
Before connecting to Rackham
Quite often, the problem is on the client side and it is not related to the remote computer or the connection to it.
Please check the points below to establish that the local setup is working fine.
The icon in the top right should be colorful for running and grayed out when is not running.
X11-Forwarding
option enabled.If you do not get output from
xhost
xclock
in MobaXterm withapt-get install xclock
.When it is done with the installation, start
xclock
to confirm that your local X11 setup is working.If this is not working - the problem is in you computer setup and UPPMAX support can not help you. Please, contact your department computer support instead.
Connect to UPPMAX (Rackham)
xclock
.Make sure the windows is not hiding behind all other windows - check on the task bar for new program tab.

If you do not get
xclock
on your screen - you have X11 forwarding problem.xclock
window, but cannot start another graphical programs like Rstudio, VMD - your X11 forwarding is working but there is another problem - paste the error into the support request.OpenGL acceleration
option in the X11 settings could resolve such problems - just test the other available options - they depend on MobaXterm ability to utilize your GPU hardware.Common errors and possible solutions
"X11 connection rejected because of wrong authentication."
If you are close below or above - you need to delete or move files from your home folder.
.Xauthority
file is not corruptedIf you get errors, you need to create a new (keep the old as backup)
Logout and login again.
You will get a warning message
xauth: file /home/user/.Xauthority does not exist
and then new.Xauthority
file will be created. Try again withxclock
.Other usual suspects
Contacts:
tags:
UPPMAX
,SNIC