Remote desktop with linux
Gnome made the current vino version (the default desktop sharing server in 18.x) very hard to set-up outside of Gnome Shell so it was removed during the Mint 19 beta and not replaced.
You can take control of your machines using RDP or VNC protocols (But RDP is not easy to install on Mint 19 any more).
Remote host configuration
Remote host is the computer you want to control.
- How to install and configure remote desktop using VNC protocol.
Local host configuration
- Taking control of your machines (RDP or VNC protocols)