How to install lightdm in ubuntu 18.04 (lightdm, gdm)

 

1. sudo apt-get update

2. sudo apt-get install lightdm
3. sudo dpkg-reconfigure lightdm
4. reboot
5. sudo systemctl status lightdm  (check the status, the device will boot into lightdm)

 

6. sudo systemctl stop lightdm

 

For default gdm mode,

disable desktop:

$ sudo systemctl stop gdm   

$ sudo loginctl terminate-seat seat0

 

enable desktop:

$ sudo systemctl start gdm