Installing the VirtualBox Guest Additions is fairly straightforward process but with Fedora 12 you will run into some problems.
Here is the error message you will see when attempting to install Guest Additions.
# /media/VBOXADDITIONS_3.1.6_59338/VBoxLinuxAdditions-amd64.run
Verifying archive integrity… All good.
Uncompressing VirtualBox 3.1.6 Guest Additions for Linux……..
VirtualBox Guest Additions installer
Removing installed version of VirtualBox Guest Additions…
Building the VirtualBox Guest [...]

Whether you work with the GIMP to create graphical content, OpenOffice to write documents, or anything in between, chances are that you will need to supplement the basic installed fonts on your Ubuntu system. There are a couple ways to go about this. If you don’t alrady have a font to install you can use [...]

Installing Boxee turns your computer into an incredible HTPC. These instructions will help you get it up and running on Ubuntu.
Update:
Boxee has recently made the latest version (9.20) of their software available for Ubuntu 64 and 32-bit. If you are installing this new version simply download the deb package off their website directly and [...]

By default Ubuntu doesn’t install the manual pages used for Linux software development which is an invaluable reference for any system developer. These man pages describe the Linux programming interface including Linux system calls as well as system library calls.
To install these man pages simply install the manpages-dev package.

$ sudo apt-get install manpages-dev

You can [...]

RPM stands for Red Hat Package Manager. There are a variety of distributions besides Red Hat that use RPM to manage packages including Fedora, Mandriva, SUSE, CentOS, and Yellow Dog Linux among others. RPM uses a database to keep track of what packages have been installed on the system and where they are located. This [...]