I tried to download Spotify for Linux a few days ago and I made a small error and it caused a message which kept me from downloading Spotify. After 2 hours I realized the mistake and I was to download Spotify, but now I can't update anything at all on my computer, and I'm scared because I might have messed with a file and deleted it or ruined it.
Now I have no idea what to do. What should I do? By the way, I'm not a computer person.
This is what it says when I try and update using
sudo apt-get update on Ubuntu 14.04:
E: GPG error: http://apt2.pennmanor.net trusty InRelease: Clearsigned file isn't valid, got 'NODATA' (does the network require authentication?)
And it is not a network proxy problem because I forgot the network and readded it and it still didn't work.