如果要在特定字符串匹配之后添加一行：
$ awk '/master.mplayer.com/ { print; print "new line"; next }1' foo.inputServerActors=IpServer.UdpServerUplink MasterServerAddress=unreal.epicgames.com MasterServerPort=27900ServerActors=IpServer.UdpServerUplink MasterServerAddress=master0.gamespy.com MasterServerPort=27900ServerActors=IpServer.UdpServerUplink MasterServerAddress=master.mplayer.com MasterServerPort=27900new lineServerActors=UWeb.WebServer
