The DNS tab allows you to configure the system's
hostname, domain, name servers, and search domain. Name servers are
used to look up other hosts on the network. Note, the name servers section
does not configure the system to be a name server.
The Hosts tab allows you to add, edit, or remove
hosts from the /etc/hosts file. This file contains
IP addresses and the hostnames to which the IP addresses should be
resolved.
When your system tries to resolve a hostname to an IP address or
determine the hostname for an IP address, it refers to the
/etc/hosts file before using the name
servers (if you are using the default Red Hat Linux configuration). If the IP
address is listed in the /etc/hosts file, the name
servers are not used.
To add an entry to the /etc/hosts file, click
Add in the Hosts tab, provide
the requested information, and click OK. Click
Apply to write the entry to the file.
 | Tip |
|---|
| | To change lookup order, edit the /etc/host.conf
file. The line order hosts, bind
specifies that the /etc/hosts takes precedence over
the name servers. Changing the line to order bind,
hosts configures your system to resolve hostnames and IP
addresses using the name servers first. If the IP address can not be
resolved through the name servers, your system looks for the IP address
in the /etc/hosts file.
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