1, restart the card
/etc/init.d/network restart
Network restart Server
2, operating results error
Close NetworkManager
Service NetworkManager STOP
3, did not appear after ifconfig eth0
Modify eth0 network card configuration file, ONBOOT = "no" instead yes
vim / etc / sysconfig / Network-scripts / the ifcfg-eth0
restart the network
/etc/init.d / Network restart
4, open pc run cmd, ping eth0's IP
5. If the ping fails, you can try to open the browser.