首先检查DHCP服务是否安装：
[root@DHCPserver /]# rpm -q dhcp
package dhcp is not installed
将光盘放入光驱，通过mount命令进行挂载。
[root@DHCPserver /]# mount /dev/cdrom /mnt
mount: block device /dev/cdrom is write-protected, mounting read-only
[root@DHCPserver /]# cd /mnt/CentOS/
[root@DHCPserver CentOS]# ls | grep dhcp //查看关键字“dhcp”文件
dhcp-3.0.5-21.el5.i386.rpm
dhcp-devel-3.0.5-21.el5.i386.rpm
dhcpv6-1.0.10-17.el5.i386.rpm
dhcpv6-client-1.0.10-17.el5.i386.rpm
libdhcp-1.20-10.el5.i386.rpm
libdhcp4client-3.0.5-21.el5.i386.rpm
libdhcp4client-devel-3.0.5-21.el5.i386.rpm
libdhcp6client-1.0.10-17.el5.i386.rpm
libdhcp6client-devel-1.0.10-17.el5.i386.rpm
libdhcp-devel-1.20-10.el5.i386.rpm
sblim-cmpi-dhcp-0.5.5-35.el5.i386.rpm
sblim-cmpi-dhcp-devel-1-35.el5.i386.rpm
sblim-cmpi-dhcp-test-1-35.el5.i386.rpm
------------------注解----------------------
dhcp-* DHCP服务器软件包
dhclient-* DHCP客户机软件包
dhcp-devel-* DHCP开发工具，非必需
--------------------------------------------
在这个目录下有DHCP的安装包，使用rpm命令进行安装。
[root@DHCPserver CentOS]# rpm -ivh dhcp-3.0.5-21.el5.i386.rpm
warning: dhcp-3.0.5-21.el5.i386.rpm: Header V3 DSA signature: NOKEY, key ID e8562897
Preparing... ########################################### [100%]
1:dhcp ########################################### [100%]
安装完之后检查是否安装到机器上。
[root@DHCPserver CentOS]# rpm -q dhcp
dhcp-3.0.5-21.el5
在安装目录下有一个模板（/usr/share/doc/dhcp-3.0.5/dhcpd.conf.sample），通过CP命令进行覆盖。
[root@DHCPserver CentOS]# cp /usr/share/doc/dhcp-3.0.5/dhcpd.conf.sample /etc/dhcpd.conf
cp：是否覆盖“/etc/dhcpd.conf”? y
通过vi进入dhcpd.conf配置文件进行配置
[root@DHCPserver CentOS]# vi /etc/dhcpd.conf
ddns-update-style interim; #配置使用过渡性 DHCP-DNS互动更新模式。 ignore client-updates; #忽略客户端更新 subnet 192.168.1.0 netmask 255.255.255.0 { option routers 192.168.1.1; #路由器地址 option subnet-mask 255.255.255.0; #子网掩码选项 option nis-domain "xfbaydhcp.com"; option domain-name "xfbaydhcp.com"; #域名 option domain-name-servers 202.102.152.3; #DNS地址 option time-offset -18000; # Eastern Standard Time range dynamic-bootp 192.168.1.100 192.168.1.200; #租用IP地址的范围 default-lease-time 21600; #缺省租约时间 max-lease-time 43200; #最大租约时间 # we want the nameserver to appear at a fixed address host ns { next-server marvin.RedHat.com; hardware ethernet 12:34:56:78:AB:CD; fixed-address 207.175.42.254; } }
设置完成，DHCP服务就搭建好了，启动服务即可。
[root@DHCPserver CentOS]# service dhcpd start
-----------------------注释-----------------
service dhcpd start #启动服务
service dhcpd stop #停止服务
service dhcpd restart #重启服务
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