CentOS 7 修改IP地址和DNS

1、查看IP地址 

ip addr

2、结果如下，可以看看网卡名称 ens33

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:fc:29:01 brd ff:ff:ff:ff:ff:ff

3、配置静态IP和DNS 

vi /etc/sysconfig/network-scripts/ifcfg-ens33

TYPE="Ethernet"
BOOTPROTO=static  # 默认dhcp,改为static,表示启用静态IP地址
DEFROUTE="yes"
PEERDNS="yes"
PEERROUTES="yes"
IPV4_FAILURE_FATAL="no"
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_PEERDNS="yes"
IPV6_PEERROUTES="yes"
IPV6_FAILURE_FATAL="no"
IPV6_ADDR_GEN_MODE="stable-privacy"
NAME="ens33"
UUID="fd03c687-9b99-4c03-b1e9-937cbd4ba659"
DEVICE="ens33"
ONBOOT="yes"            # 开机自启
IPADDR=192.168.1.73     # 静态IP地址
GATEWAY=192.168.1.1     # 网关
NETMASK=255.255.255.0   # 子网掩码
DSN1=8.8.8.8            # DNS

4、重启网络

systemctl restart network

5、安装网络工具 ifconfig，netstat

yum install net-tools -y