单个网卡操作

[root@localhost ~]# ifdown eth0   #关闭网络

[root@localhost ~]# ifup eth0     #启动网络

网络服务：

[root@localhost ~]# service network stop    #关闭网络服务

[root@localhost ~]# service network start   #启动网络服务

[root@localhost ~]# service network restart #重启网络服务

root@localhost ~]# service network status  #查看网卡状态

network.service - LSB: Bring up/down networking

   Loaded: loaded (/etc/rc.d/init.d/network; bad; vendor preset: disabled)

   Active: failed (Result: exit-code) since 五 -- :: CST; 22h ago

     Docs: man:systemd-sysv-generator()

  Process:  ExecStart=/etc/rc.d/init.d/network start (code=exited, status=/FAILURE)

8月  :: node4 systemd[]: Starting LSB: Bring up/down networking...

8月  :: node4 network[]: 正在打开环回接口： 错误：激活连接失败：No suitable device found for this connection.

8月  :: node4 network[]: [失败]

8月  :: node4 network[]: 正在打开接口 eno16777736： 错误：激活连接失败：No suitable device found for this connection.

8月  :: node4 network[]: [失败]

8月  :: node4 network[]: 正在打开接口 eth0： [  确定  ]

8月  :: node4 systemd[]: network.service: control process exited, code=exited status=

8月  :: node4 systemd[]: Failed to start LSB: Bring up/down networking.

8月  :: node4 systemd[]: Unit network.service entered failed state.

8月  :: node4 systemd[]: network.service failed.

systemctl stop NetworkManager

systemctl disable NetworkManager

然后在执行

systemctl start network.service