Failed to init server
Unable to open X display

systemctl enable lightdm.service

systemctl restart lightdm.service

#!/bin/sh
#
# ~/.xinitrc
#
# Executed by startx (run your window manager from here)
if [ -d /etc/X11/xinit/xinitrc.d ]; then
  for f in /etc/X11/xinit/xinitrc.d/*; do
    [ -x "$f" ] && . "$f"
  done
  unset f
fi
exec cinnamon-session