We should be nearly there.
You need to enable the Universe repository for ubuntu:
Code:
nano /etc/apt/sources.list
Use the down arrow to scroll to the bottom, and find the line that looks something like:
Code:
deb http://us.archive.ubuntu.com/ubuntu/ jaunty main
Add the word "universe" to the end, so that it becomes:
Code:
deb http://us.archive.ubuntu.com/ubuntu/ jaunty main universe
1. Press CTRL-o (the letter o) and enter, to write the file.
2. Press CTRL-x to exit.
3. Now re-run the apt-get update && apt-get install phpmyadmin command from above.