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<TITLE>Linux Unleashed, Third Edition:Wrapping Up the Installation</TITLE>

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<H4 ALIGN="LEFT"><A NAME="Heading14"></A><FONT COLOR="#000077">Changing CDs</FONT></H4>

<P>Whenever a CD-ROM is to be made available to the system, it is mounted on the file system with a command like this:

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mount type device mount_point

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<P><TT>type</TT> is any special instruction that applies to the CD-ROM (such as USO9660 file system or read-only), <TT>device</TT> is the device name, and <TT>mount_point</TT> is where the CD-ROM contents are to be placed in the Linux file system. For example, to mount an ISO9660 (which is the standard for CD-ROM contents) CD on the first CD device <TT>/dev/cd0</TT> to the mount point <TT>/usr/cdrom</TT>, you would issue this command:</P>

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mount -t ISO9660 /dev/cd0 /usr/cdrom

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<P>From then on, all queries to the <TT>/usr/cdrom</TT> directory and its subdirectories are steered to the CD-ROM and its contents. When you want to change the CD to another one, you should not just eject the first and insert the second (in fact, many CD-ROM drives will not allow you to do this if the disk is in use). Instead, you have to unmount the CD with the <TT>umount</TT> command, specifying either the mount point or the device. One of these two commands would unmount the CD-ROM mounted with the preceding command:</P>

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umount /dev/cd0

umount /usr/cdrom

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<P>Both commands accomplish the same task.

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<H3><A NAME="Heading15"></A><FONT COLOR="#000077">Summary</FONT></H3>

<P>This chapter has looked at a few issues, including using the package management tools to add new software to your system and using multiple CD-ROM drives. This chapter rounds out the installation section of this book. From here, we move on to look at how you can use the Linux system you&#146;ve just installed. You may want to bounce around and look up other useful information, instead of continuing on in sequence.

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<DD>To learn how to install sound cards and use them in conjunction with your system for multimedia applications, see Chapter 21, &#147;Multimedia Linux.&#148;

<DD>To learn how to install and configure XFree86, the X server that provides you with a GUI interface to Linux, see Chapter 22, &#147;Installing and Configuring XFree86.&#148;

<DD>To learn about CD-ROM devices, major and minor device numbers, and how to add new devices such as multiple CD-ROMs, see Chapter 33, &#147;Devices.&#148;

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