Interesting, please install the base-files package: sudo apt install base-files
And then try to add the repository again: sudo add-apt-repository "deb http://ppa.launchpad.net/webupd8team/haguichi/ubuntu xenial main"
Interesting, please install the base-files package:
sudo apt install base-files
And then try to add the repository again: ppa.launchpad. net/webupd8team /haguichi/ ubuntu xenial main"
sudo add-apt-repository "deb http://