|
@@ -10,77 +10,56 @@
|
|
|
|
|
|
<title>Audience</title>
|
|
<title>Audience</title>
|
|
|
|
|
|
- <para>There are many reasons why somebody would want to read this book.
|
|
|
|
- The principal reason is to install a Linux system from the source code.
|
|
|
|
- A question many people raise is, <quote>why go through all the hassle of
|
|
|
|
- manually building a Linux system from scratch when you can just download
|
|
|
|
- and install an existing one?</quote> That is a good question and is the
|
|
|
|
- impetus for this section of the book.</para>
|
|
|
|
|
|
+<para>There are many reasons why you would want to read this book. One of the
|
|
|
|
+questions many people raise is, <quote>why go through all the hassle of manually
|
|
|
|
+building a Linux system from scratch when you can just download and install
|
|
|
|
+an existing one?</quote></para>
|
|
|
|
|
|
- <para>One important reason for LFS's existence is to help people learn
|
|
|
|
- how a Linux system works from the inside out. Building an LFS system
|
|
|
|
- helps demonstrate what makes Linux tick, and how things work together
|
|
|
|
- and depend on each other. One of the best things that this learning
|
|
|
|
- experience provides is the ability to customize Linux to your own tastes
|
|
|
|
- and needs.</para>
|
|
|
|
|
|
+<para>One important reason for this project's existence is to help you learn how
|
|
|
|
+a Linux system works from the inside out. Building an LFS system helps
|
|
|
|
+demonstrate what makes Linux tick, and how things work together and depend
|
|
|
|
+on each other. One of the best things that this learning experience can
|
|
|
|
+provide you with is the ability to customize a Linux system to suit your
|
|
|
|
+own unique needs.</para>
|
|
|
|
|
|
- <para>A key benefit of LFS is that it allows users to have more control
|
|
|
|
- over the system without relying on someone else's Linux implementation.
|
|
|
|
- With LFS, <emphasis>you</emphasis> are in the driver's seat and dictate
|
|
|
|
- every aspect of the system, such as the directory layout and bootscript
|
|
|
|
- setup. You also dictate where, why, and how programs are installed.</para>
|
|
|
|
|
|
+<para>A key benefit of LFS is that it allows you to have more control over the
|
|
|
|
+system without relying on someone else's Linux implementation. With LFS,
|
|
|
|
+you are in the driver's seat and dictate every aspect of the system.</para>
|
|
|
|
|
|
- <para>Another benefit of LFS is the ability to create a very compact Linux
|
|
|
|
- system. When installing a regular distribution, one is often forced to
|
|
|
|
- include several programs which are probably never used. These programs
|
|
|
|
- waste disk space, or worse, CPU cycles. It is not difficult to build an
|
|
|
|
- LFS system of less than 100 megabytes (MB), which is substantially smaller
|
|
|
|
- than the majority of existing installations. Does this still sound like a
|
|
|
|
- lot of space? A few of us have been working on creating a very small
|
|
|
|
- embedded LFS system. We successfully built a system that was specialized
|
|
|
|
- to run the Apache web server with approximately 8MB of disk space used.
|
|
|
|
- Further stripping could bring this down to 5 MB or less. Try that with a
|
|
|
|
- regular distribution! This is only one of the many benefits of designing
|
|
|
|
- your own Linux implementation.</para>
|
|
|
|
|
|
+<para>LFS allows you to create very compact Linux systems. When installing
|
|
|
|
+regular distributions, you are often forced to install a great many
|
|
|
|
+programs which are probably never used or understood. These programs waste
|
|
|
|
+resources. You may argue that with today's hard drive and CPUs, such
|
|
|
|
+resources are no longer a consideration. Sometimes, however, you are still
|
|
|
|
+constrained by size considerations if nothing else. Think about bootable
|
|
|
|
+CDs, USB sticks and embedded systems. Those are areas where LFS can be
|
|
|
|
+beneficial.</para>
|
|
|
|
|
|
- <para>We could compare Linux distributions to a hamburger purchased at a
|
|
|
|
- fast-food restaurant—you have no idea what might be in what you are
|
|
|
|
- eating. LFS, on the other hand, does not give you a hamburger. Rather,
|
|
|
|
- LFS provides the recipe to make the exact hamburger desired. This allows
|
|
|
|
- users to review the recipe, omit unwanted ingredients, and add your own
|
|
|
|
- ingredients to enhance the flavor of the burger. When you are satisfied
|
|
|
|
- with the recipe, move on to preparing it. It can be made to exact
|
|
|
|
- specifications—broil it, bake it, deep-fry it, or barbecue it.</para>
|
|
|
|
|
|
+<para>Another advantage of a custom built Linux system is security. By compiling
|
|
|
|
+the entire system from source code, you are empowered to audit everything
|
|
|
|
+and apply all the security patches desired. It is no longer necessary to
|
|
|
|
+wait for somebody else to compile binary packages that fix a security hole.
|
|
|
|
+Unless you examine the patch and implement it yourself, you have no
|
|
|
|
+guarantee that the new binary package was built correctly and adequately
|
|
|
|
+fixes the problem.</para>
|
|
|
|
|
|
- <para>Another analogy that we can use is that of comparing LFS with a
|
|
|
|
- finished house. LFS provides the skeletal plan of a house, but it is up
|
|
|
|
- to you to build it. LFS maintains the freedom to adjust plans throughout
|
|
|
|
- the process, customizing it to the user's needs and preferences.</para>
|
|
|
|
|
|
+<para>The goal of Linux From Scratch is to build a complete and usable
|
|
|
|
+foundation-level system. If you do not wish to build your own Linux system
|
|
|
|
+from scratch, you may not entirely benefit from the information in this
|
|
|
|
+book. If you only want to know what happens while the computer boots, we
|
|
|
|
+recommend the <quote>From Power Up To Bash Prompt</quote> HOWTO located at
|
|
|
|
+<ulink url="http://axiom.anu.edu.au/~okeefe/p2b/"/> or on The Linux
|
|
|
|
+Documentation Project's (TLDP) website at <ulink
|
|
|
|
+url="http://www.tldp.org/HOWTO/From-PowerUp-To-Bash-Prompt-HOWTO.html"/>.
|
|
|
|
+The HOWTO builds a system which is similar to that of this book, but it
|
|
|
|
+focuses strictly on creating a system capable of booting to a BASH prompt.
|
|
|
|
+Consider your objective. If you wish to build a Linux system while learning
|
|
|
|
+along the way, then this book is your best choice.</para>
|
|
|
|
|
|
- <para>An additional advantage of a custom built Linux system is security.
|
|
|
|
- By compiling the entire system from source code, you are empowered to audit
|
|
|
|
- everything and apply all the security patches desired. It is no longer
|
|
|
|
- necessary to wait for somebody else to compile binary packages that fix a
|
|
|
|
- security hole. Unless you examine the patch and implement it yourself, you
|
|
|
|
- have no guarantee that the new binary package was built correctly and
|
|
|
|
- adequately fixes the problem.</para>
|
|
|
|
-
|
|
|
|
- <para>The goal of Linux From Scratch is to build a complete and usable
|
|
|
|
- foundation-level system. Readers who do not wish to build their own Linux
|
|
|
|
- system from scratch may not benefit from the information in this book. If
|
|
|
|
- you only want to know what happens while the computer boots, we recommend
|
|
|
|
- the <quote>From Power Up To Bash Prompt</quote> HOWTO located at
|
|
|
|
- <ulink url="http://axiom.anu.edu.au/~okeefe/p2b/"/> or on The Linux
|
|
|
|
- Documentation Project's (TLDP) website at <ulink
|
|
|
|
- url="http://www.tldp.org/HOWTO/From-PowerUp-To-Bash-Prompt-HOWTO.html"/>.
|
|
|
|
- The HOWTO builds a system which is similar to that of this book, but it
|
|
|
|
- focuses strictly on creating a system capable of booting to a BASH prompt.
|
|
|
|
- Consider your objective. If you wish to build a Linux system while learning
|
|
|
|
- along the way, then this book is your best choice.</para>
|
|
|
|
-
|
|
|
|
- <para>There are too many good reasons to build your own LFS system to
|
|
|
|
- list them all here. This section is only the tip of the iceberg. As
|
|
|
|
- you continue in your LFS experience, you will find the power that
|
|
|
|
- information and knowledge truly bring.</para>
|
|
|
|
|
|
+<para>There are too many good reasons to build your own LFS system to list them
|
|
|
|
+all here. In the end, education is by far the most powerful of reasons. As
|
|
|
|
+you continue in your LFS experience, you will discover the power that
|
|
|
|
+information and knowledge truly bring.</para>
|
|
|
|
|
|
</sect1>
|
|
</sect1>
|
|
|
|
+
|