1. view the NIC name
[[Email protected] ~] # IP ADDR
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 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 forever2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:0c:29:55:7d:52 brd ff:ff:ff:ff:ff:ff inet 192.168.18.212/24 brd 192.168.18.255 scope global noprefixroute ens33 valid_lft forever preferred_lft forever inet6 fe80::cfb8:9c22:bff4:c2e3/64 scope link noprefixroute valid_lft forever preferred_lft forever
2. Edit the NIC configuration file
[[Email protected] ~] # Vi/etc/sysconfig/network-scripts/ifcfg-ens33
TYPE="Ethernet"PROXY_METHOD="none"BROWSER_ONLY="no"BOOTPROTO="static"DEFROUTE="yes"IPV4_FAILURE_FATAL="no"IPV6INIT="yes"IPV6_AUTOCONF="yes"IPV6_DEFROUTE="yes"IPV6_FAILURE_FATAL="no"IPV6_ADDR_GEN_MODE="stable-privacy"NAME="ens33"UUID="e408ab5d-6013-4f49-8e37-dfdb7202a25c"DEVICE="ens33"ONBOOT="yes"IPV6_PRIVACY="no"IPADDR=192.168.18.212NETMASK=255.255.255.0GATEWAY=192.168.18.1DNS1=192.168.1.2DNS2=8.8.8.8
3. Restart the network service
[[Email protected] ~] # Service network restart
Restarting network (via systemctl): [ OK ]
Test Ping www.baidu.com.
Configure a fixed IP address in centos7.5