新安装的centos6.5无法解析地址，也无法ping通网址，会出现unkown host 增加网关route add default GW xxxx 后重启网卡发现 ：

[root@kvm network-scripts]# service network restart
Shutting down interface eth0:  Device state: 3 (disconnected)
[  OK  ]
Shutting down loopback interface:  [  OK  ]
Bringing up loopback interface:  [  OK  ]
Bringing up interface eth0:  Active connection state: activated
Active connection path: /org/freedesktop/NetworkManager/ActiveConnection/6
[  OK  ]

解决方案如下：

停用NetworkManager后再重新启动服务即可解决问题（restart network service）

[root@kvm network-scripts]# service NetworkManager stop
Stopping NetworkManager daemon: [  OK  ]
[root@kvm network-scripts]# chkconfig NetworkManager off
[root@kvm network-scripts]# chkconfig network on
[root@kvm network-scripts]# service network restart
Shutting down interface eth0:  [  OK  ]
Shutting down loopback interface:  [  OK  ]
Bringing up loopback interface:  [  OK  ]
Bringing up interface eth0:  Determining if ip address 192.168.xxx.xxx is already in use for device eth0...
[  OK  ]

本文出自 “低调的IT民工” 博客，请务必保留此出处http://vicent.blog.51cto.com/287372/1439949

centos 6.5网卡固定IP重启出错