How can I find a list of installed aptitude repositories on Ubuntu?

Question

I'm running this command when setting up new ubuntu servers

sudo add-apt-repository ppa:nginx/stable

Is there a command I can run that will show that I've run this command and added ppa:nginx/stable as a repository?

Answer 1

cat /etc/apt/sources.list /etc/apt/sources.list.d/*

Should do the trick.