| 1 | <sect1 id="ch02-aboutlfs">
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| 2 | <title>About $LFS</title>
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| 3 |
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| 4 | <para>
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| 5 | Please read the following carefully: throughout this book you will
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| 6 | frequently see the variable name $LFS. $LFS must at all times be
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| 7 | replaced by the directory where the partition that contains the LFS system
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| 8 | is mounted. How to create and where to mount the partition will be
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| 9 | explaind in full detail later on in chapter 4. In my case, the LFS
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| 10 | partition is mounted on /mnt/lfs. If I read this book myself and I see
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| 11 | $LFS somewhere, I will pretend that I read /mnt/lfs. If I read that
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| 12 | I have to run this command: cp inittab $LFS/etc, I actually will run this:
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| 13 | cp inittab /mnt/lfs/etc.
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| 14 | </para>
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| 15 |
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| 16 | <para>
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| 17 | It's important that you do this no matter where you read it; be it in
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| 18 | commands you enter on the prompt, or in a file you edit or create.
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| 19 | </para>
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| 20 |
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| 21 | <para>
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| 22 | If you want, you can set the environment variable LFS. This way you can
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| 23 | literally enter $LFS instead of replacing it by something like
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| 24 | /mnt/lfs. This is accomplished by running: export LFS=/mnt/lfs.
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| 25 | </para>
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| 26 |
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| 27 | <para>
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| 28 | If I read cp inittab $LFS/etc, I literally can type cp inittab $LFS/etc
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| 29 | and the shell will replace this command by cp inittab /mnt/lfs/etc
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| 30 | automatically.
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| 31 | </para>
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| 32 |
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| 33 | <para>
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| 34 | Do not forget to set the $LFS variable at all times. If you haven't set
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| 35 | the variable and you use it in a command, $LFS will be ignored and whatever
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| 36 | is left will be executed. The command cp inittab $LFS/etc without the $LFS
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| 37 | variable set will result in copying the inittab file to the /etc
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| 38 | directory, which will overwrite your system's inittab. A file like inittab
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| 39 | isn't that big a problem as it can easily be restored, but if you would
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| 40 | make this mistake during the installation of the C Library, you could
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| 41 | damage things.
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| 42 | </para>
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| 43 |
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| 44 | <para>
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| 45 | One way to make sure that $LFS is set at all times is adding it to
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| 46 | your /root/.bash_profile and/or /root/.bashrc file(s) so that every time you
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| 47 | 'su' to install LFS, the $LFS variable is set for you.
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| 48 | </para>
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| 49 |
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| 50 | </sect1>
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| 51 |
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