I just wanted to add that you can run gui applications through ssh with x11 forwarding, options -X or -Y (untrusted/trusted but at least in Debian back in the day they behaved the same). So if you wanted a gui file manager you run it in the ssh session on the remote server, sudo if you need but NEVER logged as root, and the window will pop on your local DE instead of having to run an entire desktop on each server