Also, in my case, I can fix the problem issuing the commands below:
sudo /etc/init.d/networking stop sudo /etc/init.d/networking start
As I use network manager, these commands affect only loopback interface. I didn't check loopback interface before restarting it. Will do next time.
Also, in my case, I can fix the problem issuing the commands below:
sudo /etc/init. d/networking stop d/networking start
sudo /etc/init.
As I use network manager, these commands affect only loopback interface. I didn't check loopback interface before restarting it. Will do next time.