Use this if you need to do special setup for a user session.
Change session in lightdm.
Then you must look to switch it.
This command is run as the user and needs to exec the command passed in the arguments to complete running the session.
So to change the default display manager use this command.
Therefore issue the following in terminal sudo apt update sudo apt install lightdm.
Lightdm is a cross desktop display manager it was built as a relatively light weight and highly customizable alternative to gdm it s developed at canonical by robert ancell and all contributors are required to assign their copyright to canonical through a contributor license agreement that allows proprietarization.
Note the default is lightdm session so you should chain to this if you need to override this setting.
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Ubuntu wiki arch wiki debian wiki.
We have discussed it in detail in the article here.
As lightdm is already available in standard ubuntu repository.
Lightdm uses various front ends to draw login interfaces which are usually referred to as lightdm greeters.
For debian based systems install lightdm by typing sudo apt install lightdm for arch based systems install lightdm by typing sudo pacman s lightdm.
Stopped light display manager.
Session wrapper is a the command to run for a session.
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This will teach you how to modify lightdm to choose a default desktop environment theme autologin and even a vnc connection.
Next if you already have a display manager installed.
Scheduled restart job restart counter is at 5.
After running this command it will list all installed display managers.