-FYI-
I could not find instructions on this, so I had to make my own.
In the event anyone needs to install the “Runtime” on Ubuntu from the command line.
Edit this file…
sudo vim /etc/apt/sources.list
Add the following http line (without quotes)
1.) “deb archive.panda3d.org/ubuntu maverick main”
(replace “maverick” with the codename of your version of Ubuntu)
Note: You may also choose to remove any reported dead panda3d links from sources.list
Also, There is no such thing as a "deb" command. You can't use it on the command line.
2.) sudo apt-get update
3.) sudo apt-get install panda3d
The samples should now work.