1 | <?xml version="1.0" encoding="ISO-8859-1"?> |
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2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" |
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3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [ |
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4 | <!ENTITY % general-entities SYSTEM "../../general.ent"> |
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5 | %general-entities; |
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6 | ]> |
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7 | |
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8 | <sect1 id="ch-bootable-grub"> |
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9 | <?dbhtml filename="grub.html"?> |
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10 | |
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11 | <title>Making the CLFS System Bootable</title> |
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12 | |
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13 | <indexterm zone="ch-bootable-grub"> |
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14 | <primary sortas="a-GRUB">GRUB</primary> |
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15 | <secondary>bootable</secondary> |
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16 | </indexterm> |
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17 | |
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18 | <para os="a">Your shiny new CLFS system is almost complete. One of the last |
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19 | things to do is to ensure that the system can be properly booted. The |
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20 | instructions below apply only to computers of x86 and x86_64 architecture, |
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21 | meaning mainstream PCs. Information on <quote>boot loading</quote> for |
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22 | other architectures should be available in the usual resource-specific |
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23 | locations for those architectures.</para> |
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24 | |
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25 | <para os="b">Boot loading can be a complex area, so a few cautionary words |
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26 | are in order. Be familiar with the current boot loader and any other |
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27 | operating systems present on the hard drive(s) that need to be bootable. |
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28 | Make sure that an emergency boot disk is ready to <quote>rescue</quote> |
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29 | the computer if the computer becomes unusable (un-bootable).</para> |
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30 | |
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31 | <warning os="w1"> |
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32 | <para>The following command will overwrite the current boot loader. |
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33 | Do not run the command if this is not desired, for example, if using |
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34 | a third party boot manager to manage the Master Boot Record (MBR). |
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35 | In this scenario, it would make more sense to install GRUB into the |
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36 | <quote>boot sector</quote> of the CLFS partition. In this case, this |
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37 | next command would become <userinput>grub-install /dev/sda2</userinput> |
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38 | .</para> |
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39 | </warning> |
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40 | |
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41 | <para os="e">Instruct GRUB to install itself into the MBR of |
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42 | <filename class="partition">sda</filename>:</para> |
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43 | |
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44 | <screen os="f"><userinput>grub-install /dev/sda</userinput></screen> |
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45 | |
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46 | <para os="c">Next, we need to generate a configuration for GRUB. |
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47 | In previous versions of grub we could create the configuration manually |
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48 | here, but with GRUB2 we can generate <filename>grub.cfg</filename> |
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49 | automatically. You can do this with the following command:</para> |
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50 | |
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51 | <screen os="d"><userinput>grub-mkconfig -o /boot/grub/grub.cfg</userinput></screen> |
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52 | |
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53 | </sect1> |
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