X11 remote graphics does not work

Remote graphics requires either using NoMachine remote desktop or tunnelling X11 through ssh. The former works on all operating systems. The latter requires an emulator on Windows, and is not recommended. Detailed information can be found in the CSC User Guide / Connecting to CSC.

If you get an error like the following:

X11 connection rejected because of wrong authentication.
Connection to localhost:13.0 refused by server.Client is not authorized to connect to server.

You might have run out of disk quota. Check that with the command quota -s and delete files from $HOME if necessary.