When this happens, it might be caused by an unconfigured loopback interface. To fix that, type this into a terminal:
sudo ifdown lo sudo ifup lo
ifdown makes sure that /var/run/network/ifstate doesn't list lo
When this happens, it might be caused by an unconfigured loopback interface. To fix that, type this into a terminal:
sudo ifdown lo
sudo ifup lo
ifdown makes sure that /var/run/ network/ ifstate doesn't list lo