What to do if the centos7 system network is unstable

Reason:

Fundamentally speaking, it is a conflict caused by NetworkMaganager (NM), which can be solved by disabling NetworkManager.

The solution is as follows:

(Recommended tutorial: centos tutorial)

1. Switch to the root account and use the chkconfig command to view both network and NetworkManager The startup configuration of each service;

[wzb@embedded ~]$ su - root
口令：
[root@embedded ~]# chkconfig –list network
network 0:关闭 1:关闭 2:启用 3:启用 4:启用 5:启用 6:关闭
[root@embedded ~]# chkconfig –list NetworkManager
NetworkManager 0:关闭 1:关闭 2:关闭 3:启用 4:关闭 5:关闭 6:关闭
[root@embedded ~]#

2. Disable NetworkManager and prevent it from starting when the computer starts:

[root@embedded ~]# chkconfig –level123456 NetworkManager off

3. Enable the network service and start it when the computer starts. In user mode 3, 4, and 5;

[root@embedded ~]# chkconfig –level345 network on

Or add a line at the end by editing the vi /etc/rc.d/rc.local file: /etc/init.d/network start

[root@embedded ~]# vi /etc/rc.d/rc.local

Recommended related video tutorials: linux video tutorial

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