Ubuntu is a a version of the Linux operating system based on the Debian distribution. It is distributed as free and open source software and has its own Graphical User Interface (GUI) environment, known as Unity. The operating system is named after the Southern African philosophy of ubuntu, meaning “humanity towards others”. At the time of writing (August 2012) Ubuntu is the most popular Linux distribution on desktop/laptop personal computers and it is also used on servers and for cloud computing.
Ubuntu is generally installed from a CD or USB drive. It can also be run can run directly from the CD, although this is much slower than running it from a hard disk. CD images of current and previous versions can be downloaded from the Ubuntu web site. The downloaded disk image (.iso) of the CD can be written to a CD or DVD or run directly from a hard drive using UNetbootin or GRUB.
Ubuntu and can also be booted and run from a USB flash drive. Settings can be saved to the flash drive to create a portable installation that can be run on any PC capable of booting from a USB drive.
For further information see the Wikipedia article on Ubuntu.
You can find a detailed tutorial on installing Ubuntu by clicking the following link:
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