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Although each release of Linux is different, in general the method used to install the software is as follows:

Repartition your hard drive(s). If you have other operating systems already installed, you will need to repartition the drives in order to allocate space for Linux. This is discussed in "Repartitioning Concepts" later in this chapter. In some distributions (such as SUSE), this step is integrated into the installation procedure. Check the documentation of your distribution to see whether this is the case. Still, it won't hurt you to follow the steps given here and repartition your hard drive in advance.

Boot the Linux installation medium. Each distribution of Linux has some kind of installation medium—usually a boot floppy or a bootable CD-ROM--that is used to install the software. Booting this medium will either present you with some kind of installation program, which will step you through the Linux installation, or allow you to install the software by hand.

Create Linux partitions. After repartitioning to allocate space for Linux, you create Linux partitions on that empty space. This is accomplished with the Linux fdisk program, covered in "Editing /etc/fstab," or with some other distribution-specific program, such as the Disk Druid, which comes with Red Hat Linux.

Create filesystems and swap space. At this point, you will create one or more filesystems, used to store files, on the newly created partitions. In addition, if you plan to use swap space (which you should, unless you have really huge amounts of physical memory, or RAM), you will create the swap space on one of your Linux partitions. This is covered in the sections "Creating Swap Space" and "Editing /etc/fstab."

Install the software on the new filesystems. Finally, you will install the Linux software on your newly created filesystems. After this, if all goes well, it's smooth sailing. This is covered in "Installing the Software." Later, in "Running into Trouble," we describe what to do if anything goes wrong.

People who want to switch back and forth between different operating systems sometimes wonder which to install first: Linux or the other system? We can testify that some people have had trouble installing Windows 95/98/ME after Linux. Windows 95/98/ME tends to wipe out existing boot information when it's installed, so you're safer installing it first and then installing Linux afterward using the information in this chapter. Windows NT/2000/XP seems to be more tolerant of existing boot information, but installing Windows first and then Linux still seems to be the safer alternative.

Many distributions of Linux provide an installation program that will step you through the installation process and automate one or more of the previous steps for you. Keep in mind throughout this chapter and the next that any number of the previous steps may be automated for you, depending on the distribution.

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Tip

While preparing to install Linux, the best advice we can give is to take notes during the entire procedure. Write down everything you do, everything you type, and everything you see that might be out of the ordinary. The idea here is simple: if (or when!) you run into trouble, you want to be able to retrace your steps and find out what went wrong. Installing Linux isn't difficult, but there are many details to remember. You want to have a record of all these details so that you can experiment with other methods if something goes wrong. Also, keeping a notebook of your Linux installation experience is useful when you want to ask other people for help — for example, when posting a message to one of the Linux-related Usenet groups or web discussion forums. Your notebook is also something you'll want to show to your grandchildren someday.[*]

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Repartitioning Concepts

In general, hard drives are divided into partitions , with one or more partitions devoted to an operating system. For example, on one hard drive you may have several separate partitions—one devoted to, say, Windows, another to FreeBSD, and another