Changeset 46a2e9c for chapter07/network.xml
- Timestamp:
- 01/06/2006 02:59:05 AM (19 years ago)
- Children:
- e1ca33a
- Parents:
- 1714f1a
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chapter07/network.xml
r1714f1a r46a2e9c 1 1 <?xml version="1.0" encoding="ISO-8859-1"?> 2 <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [ 2 <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" 3 "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [ 3 4 <!ENTITY % general-entities SYSTEM "../general.ent"> 4 5 %general-entities; 5 6 ]> 7 6 8 <sect1 id="ch-scripts-network"> 7 <title>Configuring the network Script</title> 8 <?dbhtml filename="network.html"?> 9 <?dbhtml filename="network.html"?> 9 10 10 <indexterm zone="ch-scripts-network"> 11 <primary sortas="d-network">network</primary> 12 <secondary>configuring</secondary></indexterm> 11 <title>Configuring the network Script</title> 13 12 14 <para>This section only applies if a network card is to be 15 configured.</para> 13 <indexterm zone="ch-scripts-network"> 14 <primary sortas="d-network">network</primary> 15 <secondary>configuring</secondary></indexterm> 16 16 17 <para>If a network card will not be used, there is likely no need to 18 create any configuration files relating to network cards. If that is 19 the case, remove the <filename class="symlink">network</filename> 20 symlinks from all run-level directories (<filename 21 class="directory">/etc/rc.d/rc*.d</filename>).</para> 17 <para>This section only applies if a network card is to be 18 configured.</para> 22 19 23 <sect2> 24 <title>Creating Network Interface Configuration Files</title> 20 <para>If a network card will not be used, there is likely no need to 21 create any configuration files relating to network cards. If that is 22 the case, remove the <filename class="symlink">network</filename> 23 symlinks from all run-level directories (<filename 24 class="directory">/etc/rc.d/rc*.d</filename>).</para> 25 25 26 <!-- Edit Me --> 27 <para>Which interfaces are brought up and down by the network script 28 depends on the files and directories in the <filename 29 class="directory">/etc/sysconfig/network-devices</filename> hierarchy. 30 This directory should contain a sub-directory for each interface to be configured, 31 such as <filename>ifconfig.xyz</filename>, where <quote>xyz</quote> is a 32 network interface name. Inside this directory would be files defining 33 the attributes to this interface, such as its IP address(es), subnet 34 masks, and so forth.</para> 26 <sect2> 27 <title>Creating Network Interface Configuration Files</title> 35 28 36 <para>The following command creates a sample <filename>ipv4</filename> file for 37 the <emphasis>eth0</emphasis> device:</para> 29 <para>Which interfaces are brought up and down by the network script 30 depends on the files and directories in the <filename 31 class="directory">/etc/sysconfig/network-devices</filename> hierarchy. 32 This directory should contain a sub-directory for each interface to be 33 configured, such as <filename>ifconfig.xyz</filename>, where 34 <quote>xyz</quote> is a network interface name. Inside this directory 35 would be files defining the attributes to this interface, such as its IP 36 address(es), subnet masks, and so forth.</para> 37 38 <para>The following command creates a sample <filename>ipv4</filename> 39 file for the <emphasis>eth0</emphasis> device:</para> 38 40 39 41 <screen><userinput>cd /etc/sysconfig/network-devices && … … 48 50 EOF</userinput></screen> 49 51 50 <para>The values of these variables must be changed in every file to match the 51 proper setup. If the <envar>ONBOOT</envar> variable is set to <quote>yes</quote> 52 the network script will bring up the Network Interface Card (NIC) during booting 53 of the system. If set to anything but <quote>yes</quote> the NIC will be ignored 54 by the network script and not be brought up.</para> 52 <para>The values of these variables must be changed in every file to match 53 the proper setup. If the <envar>ONBOOT</envar> variable is set to 54 <quote>yes</quote> the network script will bring up the Network Interface 55 Card (NIC) during booting of the system. If set to anything but 56 <quote>yes</quote> the NIC will be ignored by the network script and not 57 be brought up.</para> 55 58 56 <para>The <envar>SERVICE</envar> variable defines the method used for obtaining 57 the IP address. The LFS-Bootscripts package has a modular IP assignment format, 58 and creating additional files in the <filename 59 class="directory">/etc/sysconfig/network-devices/services</filename> directory 60 allows other IP assignment methods. This is commonly used for Dynamic Host 61 Configuration Protocol (DHCP), which is addressed in the BLFS book.</para> 59 <para>The <envar>SERVICE</envar> variable defines the method used for 60 obtaining the IP address. The LFS-Bootscripts package has a modular IP 61 assignment format, and creating additional files in the <filename 62 class="directory">/etc/sysconfig/network-devices/services</filename> 63 directory allows other IP assignment methods. This is commonly used for 64 Dynamic Host Configuration Protocol (DHCP), which is addressed in the 65 BLFS book.</para> 62 66 63 <para>The <envar>GATEWAY</envar> variable should contain 64 the default gateway IP address, if one is present. If not, then comment out 65 thevariable entirely.</para>67 <para>The <envar>GATEWAY</envar> variable should contain the default 68 gateway IP address, if one is present. If not, then comment out the 69 variable entirely.</para> 66 70 67 <para>The <envar>PREFIX</envar> variable needs to contain the number of bits 68 used in the subnet. Each octet in an IP address is 8 bits. If the subnet's 69 netmask is 255.255.255.0, then it is using the first three octets (24 bits) to 70 specify the network number. If the netmask is 255.255.255.240, it would be using 71 the first 28 bits. Prefixes longer than 24 bits are commonly used by DSL and 72 cable-based Internet Service Providers (ISPs). In this example (PREFIX=24), the 73 netmask is 255.255.255.0. Adjust the <envar>PREFIX</envar> variable according to 74 your specific subnet.</para>71 <para>The <envar>PREFIX</envar> variable needs to contain the number of 72 bits used in the subnet. Each octet in an IP address is 8 bits. If the 73 subnet's netmask is 255.255.255.0, then it is using the first three octets 74 (24 bits) to specify the network number. If the netmask is 255.255.255.240, 75 it would be using the first 28 bits. Prefixes longer than 24 bits are 76 commonly used by DSL and cable-based Internet Service Providers (ISPs). 77 In this example (PREFIX=24), the netmask is 255.255.255.0. Adjust the 78 <envar>PREFIX</envar> variable according to your specific subnet.</para> 75 79 76 </sect2>80 </sect2> 77 81 78 <sect2 id="resolv.conf"> 79 <title>Creating the /etc/resolv.conf File</title> 80 <indexterm zone="resolv.conf"><primary sortas="e-/etc/resolv.conf">/etc/resolv.conf</primary></indexterm> 82 <sect2 id="resolv.conf"> 83 <title>Creating the /etc/resolv.conf File</title> 81 84 82 <para>If the system is going to be connected to the Internet, it will 83 need some means of Domain Name Service (DNS) name resolution to 84 resolve Internet domain names to IP addresses, and vice versa. This is 85 best achieved by placing the IP address of the DNS server, available 86 from the ISP or network administrator, into 87 <filename>/etc/resolv.conf</filename>. Create the file by running the 88 following:</para> 85 <indexterm zone="resolv.conf"> 86 <primary sortas="e-/etc/resolv.conf">/etc/resolv.conf</primary> 87 </indexterm> 88 89 <para>If the system is going to be connected to the Internet, it will 90 need some means of Domain Name Service (DNS) name resolution to 91 resolve Internet domain names to IP addresses, and vice versa. This is 92 best achieved by placing the IP address of the DNS server, available 93 from the ISP or network administrator, into 94 <filename>/etc/resolv.conf</filename>. Create the file by running the 95 following:</para> 89 96 90 97 <screen><userinput>cat > /etc/resolv.conf << "EOF" … … 98 105 EOF</userinput></screen> 99 106 100 <para>Replace <replaceable>[IP address of the 101 nameserver]</replaceable> with the IP address of the DNS most 102 appropriate for the setup. There will often be more than one entry 103 (requirements demand secondary servers for fallback capability). If 104 you only need or want one DNS server, remove the second 105 <emphasis>nameserver</emphasis> line from the file. The IP address may 106 also be a router on the local network.</para> 107 </sect2>107 <para>Replace <replaceable>[IP address of the nameserver]</replaceable> 108 with the IP address of the DNS most appropriate for the setup. There will 109 often be more than one entry (requirements demand secondary servers for 110 fallback capability). If you only need or want one DNS server, remove the 111 second <emphasis>nameserver</emphasis> line from the file. The IP address 112 may also be a router on the local network.</para> 113 114 </sect2> 108 115 109 116 </sect1> 110
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