Я пытаюсь установить flux на ubuntu 15.10 с помощью этих команд
sudo add-apt-repository ppa:kilian/f.lux
sudo apt-get update && sudo apt-get install fluxgui
Но я получаю следующие сообщения об ошибках
W: Failed to fetch
http://ppa.launchpad.net/fantasyleague0629/wildguppy/ubuntu/dists/wily/main/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/fantasyleague0629/wildguppy/ubuntu/dists/wily/main/binary-i386/Packages 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/kilian/f.lux/ubuntu/dists/wily/main/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/kilian/f.lux/ubuntu/dists/wily/main/binary-i386/Packages 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/nvbn-rm/ppa/ubuntu/dists/wily/main/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/nvbn-rm/ppa/ubuntu/dists/wily/main/binary-i386/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
Что мне теперь делать?