Fix CENTOS7 virtual machine change static IP does not start

In Linuxman's edits, the problem did not occur. Repeated view of the cause of the failure, after the detection is caused by the virtual machine.
1. When you turn on the network, there is an error message:restarting network (via Systemctl): Job for Network.service failed. See ' systemctl status Network.service ' and ' journalctl-xn ' for details.
2. Follow the prompts: Systemctl status Network.service
Hint error log: 15:30:10 localhost.localdomain systemd[1]: Failed to start lsb:bring Up/down networking.
3. Use the IP addr command to view the MAC address (this line Link/ether 00:5c:33:2e:dd:10) as shown in the file/etc/sysconfig/network-scripts/ifcfg-* (this line hwaddr=00 : E3:21:3d:5d:ee) inconsistencies were found when comparing rows.
4. Comment out hwaddr= *:* in/etc/sysconfig/netwrok-scripts/ifcfg-*:*:*:*:* This trip
5. Change to Hwaddr=00:5c:33:2e:dd:10 below (that is, Mac found with the IP ADDR command)

Reprint to: http://www.centoscn.com/CentosBug/osbug/2015/0412/5155.html

Fix CENTOS7 virtual machine change static IP does not start