[673b0d8] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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[a811dff0] | 2 | <!DOCTYPE section [
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[673b0d8] | 3 | <!ENTITY % general-entities SYSTEM "../general.ent">
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| 4 | %general-entities;
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| 5 | ]>
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[a811dff0] | 6 | <section xmlns="http://docbook.org/docbook-ng"
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| 7 | xml:id="ch-scripts-hosts">
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[6a0e6f3] | 8 | <title>Creating the /etc/hosts file</title>
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[673b0d8] | 9 | <?dbhtml filename="hosts.html"?>
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| 10 |
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| 11 | <indexterm zone="ch-scripts-hosts"><primary sortas="e-/etc/hosts">/etc/hosts</primary></indexterm>
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| 12 |
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| 13 | <indexterm zone="ch-scripts-hosts">
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| 14 | <primary sortas="d-localnet">localnet</primary>
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| 15 | <secondary>/etc/hosts</secondary></indexterm>
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| 16 |
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| 17 | <indexterm zone="ch-scripts-hosts">
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| 18 | <primary sortas="d-network">network</primary>
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| 19 | <secondary>/etc/hosts</secondary></indexterm>
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[b08f409] | 20 |
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[fa914e5] | 21 | <para>If a network card is to be configured, you have to decide on the
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[f67f5cf] | 22 | IP-address, FQDN and possible aliases for use in the <filename>/etc/hosts</filename> file. The
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[9762eb7] | 23 | syntax is:</para>
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[b822811] | 24 |
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[0afaac4] | 25 | <screen><IP address> myhost.example.org aliases</screen>
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[b822811] | 26 |
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[f67f5cf] | 27 | <para>Unless your computer is to be visible to the Internet (e.g., you have a
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| 28 | registered domain and a valid block of assigned IP addresses - most of us don't
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| 29 | have this) you should make sure that the IP-address is in the private network
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[b822811] | 30 | IP-address range. Valid ranges are:</para>
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| 31 |
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[21ba4e3] | 32 | <screen> Class Networks
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[b08f409] | 33 | A 10.0.0.0
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| 34 | B 172.16.0.0 through 172.31.0.0
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[21ba4e3] | 35 | C 192.168.0.0 through 192.168.255.0</screen>
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[b822811] | 36 |
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| 37 | <para>A valid IP address could be 192.168.1.1. A valid FQDN for this IP could
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[f67f5cf] | 38 | be www.linuxfromscratch.org (not recommended as this is a valid registered domain
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| 39 | address and could cause your domain name server problems).</para>
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[b822811] | 40 |
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[fa914e5] | 41 | <para>If you aren't going to use a network card, you still need to
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[9762eb7] | 42 | come up with a FQDN. This is necessary for certain programs to operate
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| 43 | correctly.</para>
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[b822811] | 44 |
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[9762eb7] | 45 | <para>If a network card is not going to be configured, create the
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| 46 | <filename>/etc/hosts</filename> file by running:</para>
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[b822811] | 47 |
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[f67f5cf] | 48 | <screen><userinput>cat > /etc/hosts << "EOF"
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[b08f409] | 49 | # Begin /etc/hosts (no network card version)
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| 50 |
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[f67f5cf] | 51 | 127.0.0.1 <replaceable>[<value of HOSTNAME>.example.org]</replaceable> <replaceable>[value of HOSTNAME]</replaceable> localhost
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[b08f409] | 52 |
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| 53 | # End /etc/hosts (no network card version)
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[f67f5cf] | 54 | EOF</userinput></screen>
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[b822811] | 55 |
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[9762eb7] | 56 | <para>If a network card is to be configured, create the
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| 57 | <filename>/etc/hosts</filename> file by running:</para>
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[b822811] | 58 |
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[f67f5cf] | 59 | <screen><userinput>cat > /etc/hosts << "EOF"
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[b08f409] | 60 | # Begin /etc/hosts (network card version)
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| 61 |
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[0afaac4] | 62 | 127.0.0.1 localhost
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[f67f5cf] | 63 | <replaceable>[192.168.1.1]</replaceable> <replaceable>[<value of HOSTNAME>.example.org]</replaceable> <replaceable>[value of HOSTNAME]</replaceable>
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[b08f409] | 64 |
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| 65 | # End /etc/hosts (network card version)
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[f67f5cf] | 66 | EOF</userinput></screen>
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[b08f409] | 67 |
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[f67f5cf] | 68 | <para>Of course, the <replaceable>[192.168.1.1]</replaceable> and <replaceable>[<value of HOSTNAME>.example.org]</replaceable>
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[140190c0] | 69 | have to be changed to your liking (or requirements if assigned an IP-address
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| 70 | by a network/system administrator and this machine is planned to be connected
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| 71 | to an existing network).</para>
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[b08f409] | 72 |
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[a811dff0] | 73 | </section>
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