Remotely connecting to existing X server via VNC server

My goal was to connect to a remote desktop. Had to tweak systemd to autologin with specific user.

sudo vim /etc/systemd/system/getty@tty1.service.d/autologin.conf
ExecStart=-/usr/bin/agetty --autologin mike --noclear %I $TERM

I’m a zsh user so had to add the following into ~/.zprofile

if [[ -z $DISPLAY ]] && [[ $(tty) = /dev/tty1 ]]; then
    exec startx

So after these changes after rebooting the PC the X server started and I could connect to it.

Just had to start

x0vncserver -display :0 -rfbauth .vnc/passwd

Sat Mar 28 16:18:32 2020
 Geometry:    Desktop geometry is set to 3840x1200+0+0
 XDesktop:    Using evdev codemap
 XDesktop:    XTest extension present - version 2.2
 XDesktop:    RANDR extension not present
 XDesktop:    Will not be able to handle session resize
 Main:        Listening on port 5900

The desktop has no public IP so I had to port forward

ssh vnc-server -L 9900:localhost:5900

Now I was able to connect with vncviewer

vncviewer localhost:9900
TigerVNC Viewer 64-bit v1.10.1
Built on: 2019-12-27 09:17
Copyright (C) 1999-2019 TigerVNC Team and many others (see README.rst)
See for information on TigerVNC.

Sat Mar 28 16:20:09 2020
 DecodeManager: Detected 8 CPU core(s)
 DecodeManager: Creating 4 decoder thread(s)
 CConn:       Connected to host localhost port 9900
 CConnection: Server supports RFB protocol version 3.8
 CConnection: Using RFB protocol version 3.8
 CConnection: Choosing security type VeNCrypt(19)
 CVeNCrypt:   Choosing security type TLSVnc (258)