VMware中安装的centos6.5 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