1. 错误现象

报错信息如下:

No suitable device found for this connection (device lo not available because device is strictly unmanaged).

执行systemctl restart network错误信息如下:

Starting network (via systemctl):  Job for network.service failed because the control process exited with error code. See "systemctl status network.service" and "journalctl -xe" for details.

2. 解决方法

执行下列命令

chkconfig NetworkManager off
service NetworkManager stop
chkconfig network on
service network start

3. 确认排除故障

此时应该已经可以正常获取IP地址了

ip a
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 forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:7c:2a:50 brd ff:ff:ff:ff:ff:ff
    inet 192.168.31.17/24 brd 192.168.31.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe7c:2a50/64 scope link 
       valid_lft forever preferred_lft forever