diff options
Diffstat (limited to 'chapter09/network.xml')
| -rw-r--r-- | chapter09/network.xml | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/chapter09/network.xml b/chapter09/network.xml index c86edf56a..541ece699 100644 --- a/chapter09/network.xml +++ b/chapter09/network.xml @@ -178,9 +178,10 @@ EOF</userinput></screen> <secondary>/etc/hosts</secondary> </indexterm> - <para>Decide on the IP address, fully-qualified domain name (FQDN), and - possible aliases for use in the <filename>/etc/hosts</filename> file. The - syntax is:</para> + <para>Decide on a fully-qualified domain name (FQDN), and possible aliases + for use in the <filename>/etc/hosts</filename> file. If using static IP + addresses, you'll also need to decide on an IP address. The syntax + for a hosts file entry is:</para> <screen><literal>IP_address myhost.example.org aliases</literal></screen> @@ -197,11 +198,18 @@ EOF</userinput></screen> <para>x can be any number in the range 16-31. y can be any number in the range 0-255.</para> - <para>A valid private IP address could be 192.168.1.1. A valid FQDN for - this IP could be lfs.example.org.</para> + <para>A valid private IP address could be 192.168.1.1.</para> - <para>Even if not using a network card, a valid FQDN is still required. - This is necessary for certain programs to operate correctly.</para> + <para>If the computer is to be visible to the Internet, a valid FQDN + can be the domain name itself, or a string resulted by concatenating a + prefix (often the hostname) and the domain name with a <quote>.</quote> + character. And, you need to contact the domain provider to resolve the + FQDN to your public IP address.</para> + + <para>Even if the computer is not visible to the Internet, a FQDN is + still needed for certain programs, such as MTAs, to operate properly. + A special FQDN, <literal>localhost.localdomain</literal>, can be used + for this purpose.</para> <para>Create the <filename>/etc/hosts</filename> file by running:</para> |