Start here: “Ubuntu: An Absolute Beginner’s Guide” will teach you everything you need to know about Ubuntu in easy-to-understand language.
Ubuntu is a free/libre, open-source computer operating system with 20 million users worldwide.
If you want to know list of Kernel releases for Ubuntu, then you should to go the site lake are List or Check Installed Linux Kernels. There you will be able to see Kernels for other Linux distributions also, but to see for Ubuntu, just scroll page down.
This directory contains the most frequently downloaded Ubuntu images.
Other images, including DVDs and source CDs, may be available on the cdimage server. Ubuntu is distributed on four types of images described below.
The desktop CD allows you to try Ubuntu without changing your computer at all, and at your option to install it permanently later.
dist-upgrade in addition to performing the function of upgrade, also intelligently handles changing dependencies with new versions of packages; apt-get has a "smart" conflict resolution system, and it will attempt to upgrade the most important packages at the expense of less important ones if necessary.
The dist-upgrade command may therefore remove some packages.This type of CD is what most people will want to use.You will need at least 256Mi B of RAM to install from this CD.Two months ago we turned the page on Asterisk® GUIs by introducing a new GUI that hopefully provides the best of both worlds.It preserves the GPL components of the Free PBX® product that many of us have nurtured for almost a decade while removing the commercial pieces that have introduced some friction into the equation for users and companies that simply wished to deploy or redistribute a graphical user interface for Asterisk in accordance with the free GPL licenses under which the product and its components were licensed.§1–Introduction §2–Ubuntu 101 §3–Ubuntu Releases §8–Conclusion Migrating to a new operating system can be daunting, especially when faced with unfamiliar words like ‘FLOSS’, ‘command line interface’ and ‘kernel’. You will learn how to do the following: • install and set up Ubuntu on your computer • find technical support in your community • understand the Ubuntu philosophy • navigate the Unity desktop interface • use Ubuntu compatible software programs Before we get started with installation (see page 10), let’s take a moment to understand the philosophy and key concepts behind the Ubuntu operating system. Proprietary software is designed, developed and marketed by a company as their own system.