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1. Edit or create ~/.ssh/config

   Code Block
   Host teton Hostname teton.uwyo.edu User USERNAME ForwardAgent yes ControlMaster auto ControlPath ~/.ssh/ssh-%r@%h:%p

2. If you create the config file, it seems to be recommended to modify permissions of this file so that only user can read and modify it chmod 600 ~/.ssh/config

3. Connect to Teton in your terminal using ssh teton, provide your password and validate with 2FA. KEEP THIS TERMINAL WINDOW OPEN.

4. Now you can lauch multiple sessions on Teton using ssh teton in new terminal windows, and (a must!) you can transfer files between your machine and Teton without providing password! For synchronizing files/directories between machines, you can use rsync -av teton:PATH_TETON PATH_USER_MACHINE

5. Once done, exit Teton on all terminals and close the windows. Next time you do ssh teton you will have to provide your password.
   
   Thanks to Alex Buerkle who shared this tip !that he learned from Jared Baker, formerly of ARCC.