Originally Posted by fssengg
How can I install the "build-essential package" ?.Is it in the rpm format?
Nope, Ubuntu is a Debian based distro and uses .deb files with Apt, the package manager.
In the terminal try:
sudo apt-get install build-essential
Alternatively you can use the Synaptic Package Manager (found in System -> Administration), which is a graphical front-end to Apt.