If there’s one thing I absolutely detest about GNOME 3, it’s the lack of customizability. Yeah, I know improvements are on the way, but believe me, it feels like a really long wait when you have to bend over backwards to change anything around here. After all, one key area where Linux scores over Windows/OS X is the ability to customize almost anything to suit your needs.
Before this mini-rant takes it off topic though, here’s how you can clear all your saved wifi connections in GNOME 3. If you’re wondering why you might need this, it’s for those times when you’re only experimenting (ahem!) with your neighbours’ wifi connections to see if you can guess their passwords. Sometimes you get lucky and manage to connect, only to find out that your neighbour has changed the password a few days later. Follow these steps to get rid of those annoying pop-ups that prompt you to connect to a remembered wifi connection.
Remove all files under /etc/NetworkManager/system-connections with the following commands –
rm -r *
Or, if you’re not comfortable with the command line, press Alt+F2 and type the following at the prompt that appears –
A window titled “Network Connections” should open up. Find the connection that you no longer need under the “Wireless” tab and delete it.