If you want to give a new look to your Ubuntu boot splash screen, then just install plymouth themes tool in your system and place a new boot splash screen image file or new plymouth themes into /usr/share/plymouth/themes directory, then edit a file. That’s it.
Install new Boot Splash Screen in Ubuntu:
To change your Boot Splash Screen in Ubuntu, first you need to install plymouth themes tool. Open your terminal app and run the the below command.
sudo apt update
And type your Ubuntu password and hit enter. then type and run the below command.
sudo apt install plymouth-themes
This will install the plymouth themes tool on Ubuntu. After the successful installation of plymouth themes tool, it will create /usr/share/plymouth/themes directory in your system.
Next create your own boot splash screen or search from already available free plymouth themes from below links.
Download your favorite theme from the above link and extract the theme and copy it to the /usr/share/plymouth/themes directory.
Note: If you have an old plymouth theme, then its .plymouth file might point to /lib/plymouth/themes/. and you will get path errors.
Now in terminal set the new plymouth theme as the default one by using the below command.
sudo update-alternatives --install /usr/share/plymouth/themes/default.plymouth default.plymouth /usr/share/plymouth/themes/"path/to-your-plymouth.plymouth" 100
You need to replace the “path/to-your-plymouth.plymouth” with your original path and file name.
Then run the below command.
sudo update-alternatives --config default.plymouth
sudo update-initramfs -u
After that restart your Ubuntu System to check your new Boot Splash Screen.