On Ubuntu 16.04 I added the following line to /etc/apt/source.list:
deb http://downloads.sourceforge.net/project/sonar-pkg/deb binary/
Then I run sudo apt-get update. The following warning shows up:
W: The repository 'http://downloads.sourceforge.net/project/sonar-pkg/deb binary/ Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
Is there a way to pass a authentication for the sonar packages to apt?