I'm getting errors like
Err http://ppa.launchpad.net YOUR_UBUNTU_VERSION_HERE/main Sources
404 Not Found
Is it actually supposed to say YOUR_UBUNTU_VERSION_HERE, or is there some kind of an error that keeps it from writing my Ubuntu version?
YOUR_UBUNTU_VERSION_HERE
should be the output oflsb_release -sc
. Edit your question to add the output ofgrep YOUR /etc/apt/sources.list* -R
.