Comment 8 for bug 1301015

Felipe Rechia (feliperechia) wrote :

I had the same problem in ubuntu 14.04. The following thread shows a workaround:

http://askubuntu.com/questions/230698/how-to-restart-the-networking-service?lq=1

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

This worked for me, restarted all interfaces except loopback.