added GUI instruction again

content/en/docs/Getting Started/Hosted/bunya.md

@@ -28,4 +28,11 @@ ml av
 Or you can module load any tool you need:
 ```
 ml qsmxt/6.4.1
-```
+```
+
+If you want to use GUI applications (fsleyes, afni, suma, ...) you need to overwrite the temporary directory to be /tmp (otherwise you get an error that it cannot connect to the DISPLAY):
+```
+export TMPDIR=/tmp 
+```
+
+If you are missing an application, please contact [email protected] and ask for the neurodesk installation to be updated on Bunya :)