| [6370fa6] | 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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| [aff91c4] | 5 | Please read the following carefully: throughout this book
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| 6 | the variable name $LFS will frequently be used. $LFS must at all times be
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| [6370fa6] | 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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| [01c8218] | 9 | explaind in full detail later on in chapter 4. In my case, the LFS
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| [6370fa6] | 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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| [01c8218] | 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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| [6370fa6] | 14 | </para>
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| 15 |
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| 16 | <para>
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| [aff91c4] | 17 | It's important that this is done no matter where it is read; be it in
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| 18 | commands entered on the prompt, or in a file edited or created.
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| [6370fa6] | 19 | </para>
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| 20 |
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| 21 | <para>
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| [aff91c4] | 22 | Another possible solution is to set the environment variable LFS.
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| 23 | This way the $LFS can be entered literally instead of replacing it by
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| 24 | something like
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| [01c8218] | 25 | /mnt/lfs. This is accomplished by running: export LFS=/mnt/lfs.
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| [6370fa6] | 26 | </para>
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| 27 |
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| 28 | <para>
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| 29 | If I read cp inittab $LFS/etc, I literally can type cp inittab $LFS/etc
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| 30 | and the shell will replace this command by cp inittab /mnt/lfs/etc
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| 31 | automatically.
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| 32 | </para>
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| 33 |
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| 34 | <para>
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| [aff91c4] | 35 | Do not forget to set the $LFS variable at all times. If
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| 36 | the variable is not set and is used it in a command, $LFS will be ignored
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| 37 | and whatever
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| [6370fa6] | 38 | is left will be executed. The command cp inittab $LFS/etc without the $LFS
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| [01c8218] | 39 | variable set will result in copying the inittab file to the /etc
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| [aff91c4] | 40 | directory, which will overwrite the host-system's inittab. A file like inittab
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| 41 | isn't that big a problem as it can easily be restored, but if
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| 42 | this mistake is made during the installation of the C Library, things might
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| 43 | be damaged
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| [6370fa6] | 44 | </para>
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| 45 |
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| 46 | <para>
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| [01c8218] | 47 | One way to make sure that $LFS is set at all times is adding it to
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| [aff91c4] | 48 | the /root/.bash_profile and/or /root/.bashrc file(s) so that every time a
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| 49 | 'su' to root is done to install LFS, the $LFS variable is set for.
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| [6370fa6] | 50 | </para>
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| 51 |
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| 52 | </sect1>
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| 53 |
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