centos6.6重启网络报错Error: Connection activation failed: Device not managed by NetworkManager的解决办法

VMware中安装的centos6.6 64位，重启网络连接时，报以下错误：

Bringing up interface eth0: Error:Connection activation failed:Device not managed by NetworkManager

解决方法：

1、Remove Network Manager from startup Services.

[root@localhost ~]# chkconfig NetworkManager off

2、Add Default Net Manager

[root@localhost ~]# chkconfig network on

3、Stop NetworkManager first

[root@localhost ~]# service NetworkManager stop

4、and then start Default Manager

[root@localhost ~]# service network start

5、然后重新启动网络，可能还会出现以下信息，可以不用管，也可以重启一下电脑主机
RTNETLINK answers: File exists

RTNETLINK answers: File exists
RTNETLINK answers: File exists