systemctl start sshd

1.查看dhcp服务安装情况(默认只有客户端dhcp)

rpm -qa | grep dhcp

2.安装dhcp服务器

①cd /run/media/test/"RHEL-7.2 Server.x86_64"/Packages

②rpm -ivh dhcp-4.2.5-42.el7.x86_64.rpm

3.修改/etc/dhcp/dhcpd.conf

①复制/usr/share/doc/dhcp*/dhcpd.conf.example中的内容

②设置DNS域名解析，修改行“option domain-name-servers ns1.example.org, ns2.example.org;”为

“option domain-name-servers 8.8.8.8, 114.114.114.114;”

③设置IP地址池（注意网段与本机网段一致）：

subnet 192.168.31.0 netmask 255.255.255.0 {
  range 192.168.31.210 192.168.31.220;
  option routers 192.168.31.1;
}

3.查看服务状态

systemctl list-unit-files |grep dhcp

4.重启服务

systemctl restart dhcpd

5.安装dhclient进行测试用

①cd /run/media/test/"RHEL-7.2 Server.x86_64"/Packages

②rpm -ivh dhclient-4.2.5-42.el7.x86_64.rpm

6.测试dhcp

新建一个IP配置，默认DHCP获取方式，查看dns是否为8.8.8.8 114.114.114.114