Problem: Lost my wifi connection after using HP Laptop running uBuntu 18.04 in a public place. My wifi symbol was gone when I got home. When I click on System Task Bar it says wifi is not connected. I then click on connect wifi, and then choose my home network and it asks for authentication. My wifi signal then appears and Ubuntu shows that I am connected to my network. I am using Firefox as my web browser.. When I try to go anywhere on the web I get a "Hmmm we can't find that website" no matter what it is. I have another laptop, a DELL Latitude running Win 7 and it connects to my home network with no problem. Also, now when I return to this restaurant with either laptop it connects to their wifi with no problem.
Did I get hacked at the public wifi? What do I have to do to get my wifi working again? Anyone have any suggestions? Is this a Mozilla problem as I use that on both laptops but the one running Ubuntu is giving problem.