Linux or GNU/Linux is a free operating system that you can use in addition to Windows or instead of it. Most of the software for it is also free.
Linux makes a great alternative to Windows because it has very few virus threats, and lots of Windows replacement software.
If you would like more background reading on Linux, visit GetGNULinux.org, or continue reading this page on how to try Linux for free.
There are two easy ways to try Linux:
A "live CD" is a type of Linux that runs directly from the CD and does not affect your hard drive. When you remove the CD the computer will go back to how it was before. A good place to start is to download the Knoppix CD. (See below for instructions on how to burn a Linux ISO file to a CD.) Knoppix Linux will run on your computer from a CD without installing anything. Knoppix is a complete operating system with web browsers, chat and messaging programs, graphics programs, and much much more. To learn about some of the uses of Knoppix I recommend checking out the book Knoppix Hacks, or searching online.
[UPDATE: With the release of Ubuntu 6.06 on June 1st, 2006, I would now recommend trying the Ubuntu live CD instead of Knoppix. If you decide that you like the live CD you can install Ubuntu next to Windows with the same live CD. Just be sure to backup your data and to defragment your hard drive before installing Ubuntu next to Windows.]
If you want to install Linux on your hard drive you can make a dual boot system so that you can choose to boot Windows or Linux at startup. Before trying to make a dual boot system with Windows and Linux, be sure to read about how to do it (search Google). If you are going to install Linux for the first time I recommend Ubuntu Linux, which is mentioned below. To make a dual boot system you first need to make an empty partition for Linux on your hard drive. This involves either reinstalling Windows to a smaller partition, or defragmenting your drive and then resizing your partition with the Ubuntu live CD. If you are feeling more adventurous you might even want to do away with Windows and just use Linux, although I would recommend trying the Ubuntu live CD first, and then trying a dual-boot system before getting rid of Windows completely.
To get Linux for free, you download disk images (.iso files) and then burn them to CDs with a program that has the capability to burn disk images. Simply copying the .iso images to CDs won't work. Instructions can be found here. A free program for Windows XP that will burn an .iso disk image to make a bootable CD is CD Burner XP.
This section contains news about real-world applications of free open-source software around the world. Contact me if you have any news to add. If you want to try Linux without modifying your computer, get a free copy of Knoppix Linux or another "live" CD that runs on your computer without installing anything (see the Linux section above).
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