如果网卡启动失败 报如下错误Device not managed by NetworkManager or unavailable 解决办法: 1 chkconfig NetworkManager off 2 chkconfig network on 3 service NetworkManager stop 4 service network start 英文原文如下(大体意思是停掉NetworkManager,启用默认的Manager):
Remove Network Manager from startup Services. chkconfig NetworkManager off
Add Default Net Manager chkconfig network on Stop NetworkManager first service NetworkManager stop and then start Default Manager service network start or you can change it easy: system-config-network uncheck the box that sets the eth0 as managed by NetworkManager and set IP info from there. system-config-services stop and disable NetworkManager , start and enable network you have problem because both of NetworkManager and Network using same Network driver and default network blocking access for NetworkManager. if you disable NetworkManager your problem will disappeared after restart.