Hello! sorry but somewhat of a noob. I am really interested in SSH'ing into my rig from external networks, I have used Team viewer, but with local SSH it seems a lot more reliable.

So essentially I have two questions:
1) When I am connected through SSH and let's say I want to restart the gnome terminal back on the miner instead of my computer what command do I use to restart the PID that I initially closed.
2) How would I go about setting up a remote server which I can ssh into remotely, without being in the local area network?

Any help is appreciated! Also absolutely love your work, plan on showcasing it in videos once I learn a bit more about it! Thanks so much!
(Ps. if anyone has used ASUS Dual Series 1070's and found the optimal OC for them please let me know!)