1.查看ip地址 ip addr

2.进入ip地址配置文件修改ip

/etc/NetworkManager/system-connections

3.编辑网络配置信息

[root@localhost system-connections]# ls
ens160.nmconnection
[root@localhost system-connections]# vi ens160.nmconnection
#在[ipv4下添加网络信息配置]
[ipv4]
#method=auto
method=manual
may-fail=false
address1=10.168.20.51/24,10.168.20.1
dns=114.114.114.114
#4.加载，激活配置
[root@PC1 system-connections]# nmcli connection reload ens160.nmconnection ## 重新加载配置文件
[root@PC1 system-connections]# nmcli connection up ens160 ## 激活配置文件

5.查看结果
[root@localhost system-connections]# ip addr |grep ens160
2: ens160: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
inet 10.168.20.51/24 brd 10.168.20.255 scope global noprefixroute ens160
[root@localhost system-connections]#

6.测试网络是否联通
[root@localhost system-connections]# ping baidu.com
PING baidu.com (110.242.68.66) 56(84) bytes of data.
64 bytes from 110.242.68.66 (110.242.68.66): icmp_seq=1 ttl=50 time=44.3 ms
64 bytes from 110.242.68.66 (110.242.68.66): icmp_seq=2 ttl=50 time=44.4 ms

其他初始化设置