This script assumes that the Installation of Ubuntu 20.xx is a fresh install. If you tried to change the GDM background with someother scripts, you first need to reset those changes. Other scripts may have the option --reset.

Recommended: Please have a look on the 'TrailRun' Branch for single line commands like below

sudo ./focalgdm3 /absolute/path/to/Image
sudo ./focalgdm3 \#aAbBcC

Change the login screen background for Ubuntu 20.04 only.

this script is to change the login screen background of Ubuntu 20.04 only.

you can download the focalgdm3 file via command line

wget -qO - https://github.com/PRATAP-KUMAR/focalgdm3/archive/master.tar.gz | tar zx --strip-components=1 focalgdm3-master/focalgdm3

Once you downloaded the script focalgdm3. cd to the downloaded script file.

run the below command with root priviliges and follow the prompts. ./focalgdm3 --set

to reset everything that the script made run the below command with root priviliges ./focalgdm3 --reset