How to set up stable remote access as correctly as possible?

Question

linux

I beg you: /
In general, there is an old, weak, PC. (Pentium 2)
Temporarily have a monitor.
You need to set up remote access that will work stably, because there will be no access to the monitor.
It is possible both on Linux and on ... No, only Linux.
It should be clear to the most stupid teapot, and the same PC. Thank you! (Manjaroxfce)

Answer 1

Throw it away...

Answer 2

install on an old computer X2Go Desktop Sharing
everything works out of the box.
use X2Go Client to connect

Answer 3

on linux ssh
on windows vnc/rdp

Answer 4

openSSH.