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Update X11_forwarding.md #188

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19 changes: 10 additions & 9 deletions X11_forwarding.md
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Expand Up @@ -7,8 +7,14 @@ CARC cluster compute node. This QuickByte will show you how to do X11 forwarding
## On a Mac

Before getting started, make sure you have [XQuartz](https://www.xquartz.org) downloaded and installed. This allows the X11
forwarding.
forwarding.

**NOTE:** On Apple computers with Applic silicon chips there is an issue with the background of X11 windows being rendered black. [One solution](https://www.mathworks.com/matlabcentral/answers/1622355-matlab-gui-displays-black-with-xquartz) to this problem is to create a file in your home directory named `java.opts` with the following text:

```
-Dsun.java2d.xrender=false
-Dsun.java2d.pmoffscreen=false
```

## On a PC

Expand All @@ -23,16 +29,10 @@ Before getting started, download [MobaXterm](https://mobaxterm.mobatek.net) and
$ ssh -X [email protected]
```

2. Start an interactive session using qsub, but again include the -X flag.

```
$ qsub -IX -l nodes=1:ppn=1
```

Note that the equivalent command using slurm would be as follows:
2. Start an interactive session using srun.

```
srun --x11 --nodes=1 --ntasks=1 xterm
srun --pty --x11 --nodes=1 --ntasks=1 bash
```

3. Once you have been assigned a node, load the MATLAB module. Then start MATLAB. You should automatically get a MATLAB GUI
Expand All @@ -56,3 +56,4 @@ https://www.youtube.com/watch?v=-5ic9JWHuqI&list=PLvr5gRBLi7VAzEB_t5aXOLHLfdIu2s

If you have any trouble at any point please reach out to us at [email protected]

*This QuickByte was validated on 6/17/2024*