I don't have access to a vmware license so I decided to try Virtualbox. I followed the instruction on the link http://www.virtualbox.org/wiki/Linux_Downloads, Debian-based Linux distributions to install virtualbox in Linux. I have 32-bit Ubuntu 10.04.

Download virtualbox-3.2_3.2.6-63112~Ubuntu~lucid_i386.deb.

Add one of the following lines to your /etc/apt/sources.list:

deb http://download.virtualbox.org/virtualbox/debian lucid non-free
deb http://download.virtualbox.org/virtualbox/debian karmic non-free
deb http://download.virtualbox.org/virtualbox/debian jaunty non-free
deb http://download.virtualbox.org/virtualbox/debian intrepid
non-free
deb http://download.virtualbox.org/virtualbox/debian hardy non-free
deb http://download.virtualbox.org/virtualbox/debian lenny non-free
deb http://download.virtualbox.org/virtualbox/debian etch non-free


Combined downloading and registering the public key but I replaced
1. with the 2. because I get the error:
"W: GPG error: http://download.virtualbox.org etch Release:
The following signatures couldn't be verified because the public key
is not available: NO_PUBKEY 54422A4B98AB5139"

1. wget -q http://download.virtualbox.org/virtualbox/debian/
oracle_vbox.asc -O- | sudo apt-key add -

2. wget -q http://download.virtualbox.org/virtualbox/debian/
sun_vbox.asc -O- | sudo apt-key add -


I refered to the following thread to solve the error:
http://ubuntuforums.org/showthread.php?t=92558


Run sudo dpkg -i virtualbox-3.2_3.2.6-63112~Ubuntu~lucid_i386.deb.

Run sudo apt-get -f install to remove the dependency errors.

Then run sudo apt-get update then sudo apt-get install
virtualbox-3.2.