I upgraded my Ubuntu from 16.04 to 18. And the Internet stopped working. 😦
I tried rebooting
interface, adding a new interface to
ifconfig. But it did not help.
What helped was an answer on AskUbuntu
How it worked?
The answer is in how Ubuntu lookup domains like
Check the domain in the local DNS, also called a DNS stub.
If Step 1 fails (local DNS lookup is a
miss), it contacts a public DNS such as
18.104.22.168also called Google Public DNS.
Since after the upgrade public DNS was not set, the internet seemed inaccessible!
How to Update Public DNS?
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