Text update

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@354 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter02/aboutlfs.xml

@@ -3,50 +3,53 @@
 
 <para>
 Please read the following carefully: throughout this book 
-the variable name $LFS will frequently be used. $LFS must at all times be
+the variable $LFS will be used frequently. $LFS must at all times be
 replaced by the directory where the partition that contains the LFS system 
 is mounted. How to create and where to mount the partition will be
-explaind in full detail later on in chapter 4. In my case, the LFS 
+explaind in full detail in chapter 4. In my case, the LFS 
-partition is mounted  on /mnt/lfs. If I read this book myself and I see 
+partition is mounted  on /mnt/lfs.
-$LFS somewhere, I will pretend that I read /mnt/lfs. If I read that 
+</para>
-I have to run this command: cp inittab $LFS/etc, I actually will run this: 
+
-cp inittab /mnt/lfs/etc.
+<para>
+For example when you are told to run a command like
+<userinput>./configure --prefix=$LFS</userinput> you will actually run
+<userinput>./configure --prefix=/mnt/lfs</userinput>
 </para>
 
 <para>
 It's important that this is done no matter where it is read; be it in
-commands entered on the prompt, or in a file edited or created.
+commands entered in a shell, or in a file edited or created.
 </para>
 
 <para>
 Another possible solution is to set the environment variable LFS.
-This way the $LFS can be entered literally instead of replacing it by 
+This way $LFS can be entered literally instead of replacing it by 
-something like
+/mnt/lfs. This is accomplished by running <userinput>export
-/mnt/lfs. This is accomplished by running: export LFS=/mnt/lfs.
+LFS=/mnt/lfs</userinput>.
 </para>
 
 <para>
-If I read cp inittab $LFS/etc, I literally can type cp inittab $LFS/etc
+Now, if you read to run a command like <userinput>./configure
-and the shell will replace this command by cp inittab /mnt/lfs/etc
+--prefix=$LFS</userinput> you can type that literally. Your shell will
-automatically.
+replace $LFS with /mnt/lfs when it processes the command line (meaning
+when you hit enter).
 </para>
 
 <para>
-Do not forget to set the $LFS variable at all times. If 
+If you plan to use $LFS, do not forget to set the $LFS variable at all 
-the variable is not set and is used it in a command, $LFS will be ignored 
+times. If the variable is not set and is used it in a command, $LFS will 
-and whatever
+be ignored and whatever is left will be executed. A command like
-is left will be executed. The command cp inittab $LFS/etc without the $LFS
+<userinput>echo "root:x:0:0:root:/root:/bin/bash" &gt; 
-variable set will result in copying the inittab file to the /etc
+$LFS/etc/passwd</userinput> without the $LFS variable set will
-directory, which will overwrite the host-system's inittab. A file like inittab 
+re-create your host system's /etc/passwd file. Simply put: it will
-isn't that big a problem as it can easily be restored, but if 
+destroy your current password database file.
-this mistake is made during the installation of the C Library, things might
-be damaged
 </para>
 
 <para>
 One way to make sure that $LFS is set at all times is adding it to
-the /root/.bash_profile and/or /root/.bashrc file(s) so that every time a
+the /root/.bash_profile and/or /root/.bashrc file(s) so that every time
-'su' to root is done to install LFS, the $LFS variable is set.
+you login as user root, or you 'su' to user root, the $LFS variable is
+set.
 </para>
 
 </sect1>