Well this is a must especially for developers. Never miss the valuable outputs (printfs etc) on the terminal while checking your SDL app!
Check if X11 Forwarding is enabled on your GS (by default it is)
and look for the line:
Make sure this line is not commented with
#in the beginning
Download an ssh client which supports X11 on your desktop. For windows I recommend MobaXterm
Create an ssh connection/session with the above tool on your GameShell, make sure X11-Forwarding is enabled
Start an ssh session to your GameShell
In the screenshot above look on top for the green checks on X11-Forwarding and DISPLAY
You are set to go, to test fire
Want some more?