لطفا منتظر باشید ...
Summary
There are two key services that help your Linux computer communicate on a TCP/IP network such as the Internet: DNS and DHCP. This chapter showed you how to configure clients and servers for each service.
A DNS server is a database of FQDN and IP addresses. You can configure master, slave, caching-only, or forwarding DNS servers. Red Hat encourages the use of redhat-config-bind to configure the main DNS configuration files, /etc/named.conf and several files in /var/named. If you use this tool, add special configuration options to /etc/named.custom. Once you’ve configured the server, you can start the named daemon, which controls DNS, with the service named start command.
Generally, no special configuration is required to set up a DNS client. Normally, a DNS client will search through /etc/hosts before moving to the DNS servers identified in /etc/resolv.conf.
A DHCP server enables you to manage the IP addresses on your network. You can also set up other basic network information in the /etc/dhcpd.conf configuration file, such as gateways, DNS servers, NIS servers, and even SMTP servers. As long as the DHCP server computer has a network card with an IP address, you can start the DHCP server with the service named dhcpd command. Configuring a gateway computer to transfer DHCP messages between networks is possible with the dhcrelay daemon. Once you’ve set up a DHCP server, you can lease an address with the dhclient command. Leased addresses are stored in a /var/lib/dhcp/dhcpd.leases database.
Configuring DHCP clients is fairly easy; the key file is the configuration file for your network card in the /etc/sysconfig/network-scripts directory. If there is a DHCP server for your LAN, you can get your IP addressing information for it immediately with the dhclient command.
In the next chapter, we’ll look at the two major print systems for Linux: the Common Unix Print System (CUPS) and the Line Print Daemon (LPD).
