This script automates the process of setting an image in the GNOME Display Manager 3 background which comes by default with Ubuntu version 20.04 Focal Fossa.
This script wont work with any older version of Ubuntu because they have a different way of dealing with gdm settings.
It also won't work if your system is set to a custom gdm3 theme. You will have to reset to the default configuration of gdm3 before using the script.
This tool was made specifically to work with Ubuntu 20.04 as it now bundles all configuration files inside a .gresource file.
If you are going to set an image file that has spaces in its file name or folders, remember to scape them with backslashes.
First, you will need to install libglib2.0-dev-bin with sudo apt install libglib2.0-dev-bin
Then, you can download the script with the command below:
wget github.com/thiggy01/ubuntu-20.04-change-gdm-background/raw/master/ubuntu-20.04-change-gdm-background
And set it as an executable with chmod +x gdm-change-login-background
Run the script with root privileges such as sudo ./ubuntu-20.04-change-gdm-background /path/to/image.
If you see a message login image sucessfully changed, then, when you restart gdm or reboot your
computer, your gdm background should be covered with the image you selected.
You can restore your original gdm theme any time with sudo ./ubuntu-20.04-change-gdm-background --restore.
If you feel this tool was useful and want to show some appreciation, you can donate via https://ko-fi.com/thiggy01.
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent