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 can
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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 you could add it to
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46 | your /root/.bash_profile and/or /root/.bashrc file(s) so everytime you
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47 | 'su' to user too as 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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