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You also have two other options.

I wanted to roslaunch a gui so after hours of searching I found a way!

If you want to run the node and gui on the remote machine, after establishing ssh connection run this command.

export DISPLAY=:0

or (if the first one didn't work)

export DISPLAY=:0.0

the turtlesim node will be launched on the remote machine.

but if you want to get the gui on your main computer just use:

ssh -X

The good thing is by editing my env.sh file I was able to roslaunch my nodes. I just add the first command at the end of my env.sh file.