I was trying to download Ubuntu sdk entering:
sudo add-apt-repository ppa:ubuntu-sdk-team/ppa && sudo apt-get update && sudo apt-get install ubuntu-sdk
However, the answer was
Cannot acces ppa, please check your internet connection, which I did by pinging google. My internet connection was fine.
I also tryed swapping
apt-add which didn't work either.
Does someone know an answer?