Ubuntu14.04修改配置，重启网卡没有生效，出现如下问题：

service  networking restart //重启网络服务stop: Job failed while stoppingstart: Job is already running: networking tail -f /var/log/upstart/networking.log //查看错误日志Stopping or restarting the networking job is not supported.Use ifdown & ifup to reconfigure desired interface.

 

从以上日志内容可以看出，传统的service重启和停止网络已经不再支持了，需要通过使用ifdown & ifup来实现相应的操作。

• 重启指定网卡

　　ifdown eth0 && ifup eth0

• 重启除lo网卡的所有网卡

　　ifdown --exclude=lo -a && sudo ifup --exclude=lo -a

• 配置桥接

# apt-get install bridge-utils# cat /etc/network/interfacesauto loiface lo inet loopbackauto eth0iface eth0 inet manualauto br0iface br0 inet staticaddress 192.168.0.10netmask 255.255.255.0gateway 192.168.0.1bridge_ports eth0bridge_stp offbridge_fd 0bridge_maxwait 0dns-nameservers 192.168.0.1# ifup br0# brctl  showbridge name   bridge id       STP enabled interfacesbr0       8000.02000a0080e1   no      eth0