With regards to Plymouth --
Are there alternative boot screens available?
What's the easiest way to change the boot screen?
You can get a list of themes available via the repositories through Synaptic Package Manager or through the command line via
You can then install the resulting packages via Synaptic or aptitude as normal:
If you're looking for something not in the repositories, UbuntuGeek has an excellent tutorial on how to install and create your own custom Plymouth themes.
Getting Started Guide
You can edit Plymouth with a simple text editor for animations and images. This is Ubuntu version agnostic.
Make a template.
First lets get a template to work with that covers all the basic aspects of a Plymouth. Change
Customize file names.
Now you can change some names to help identify our theme from others.
Edit image files.
Use your image editor of choice to alter the png images. I like GIMP for quick edits.
Here is an example of my alterations:
Edit the configuration files.
1) Set up theme information file.
Edit lines 2, 7, and 8 and change ubuntu logo to you theme name.
2) Start-up terminal color. (Optional)
Change it from purple to something else.
Edit line 1 with RGB color code.
A good site to help you is Color-Hex. I am just going to make mine black.
3) The script file to apply theme changes.
There is many different aspects to this file that you can change to customize your plymouth boot theme. If you wish to do more advanced changes you should study it. I am only showing how to change the background color, logo, and status indicator.
Edit lines 169, 170, 174, and 180 to change the background gradient and images you edited earlier.
Send your theme folder.
Set Plymouth configuration to use theme.
Restart to watch it in action.
To change between the installed themes you should do:
The first will list available themes to choose from, the second command with update initramfs with a new theme.