SSH is a handy method of connecting to a computer in terminal mode that, if you have the required permissions, allows you to to administrative tasks on a remote system.
Connect to host ssh [user]@[host]
Generate SSH key ssh-keygen -b 4096
Run a command and exit ssh [user]@[host] [command]
X11 Session forwarding ssh -X [user]@[host]
TCP port forwarding ssh -L [localport]:[host]:[port] [user]@[host]
SOCKS5 proxying ssh -D 9999 [user]@[host]
End session exit