There’s more than one way to install applications in Ubuntu. You can use apt, the Synaptic Package Manager, or, you can can even use the Add/Remove menu under Applications.
It brings up a nice interface that allows you to select software to install by category and even lets you sort them by popularity. (Ubuntu comes with a package called popularity-contest that submits back anonymous information to Ubuntu about what software is installed.)
I checked the box next to xpdf since it is one of my favorite PDF readers and pushed Apply. After confirming and asking me for my password, it began the install.
After an absolutely painless install, I head back up to my menu to find that the program launcher is already there. Gone are the days when you would have to logout/login for your menu changes to propogate.










