解决CentOS操作系统网络异常问题

现象：

网络突然无法连接，执行ifconfig后没有看到ens33

解决方案

停止并禁用 NetworkManager

systemctl stop NetworkManager
systemctl disable NetworkManager

2. 启动并开机自启 network

systemctl start network
systemctl enable network

3. 验证状态

systemctl status network
systemctl status NetworkManager
ifconfig