Hmmm,for me it works. 2. Code: wget -O - http://qtlabs.org.br/~lmoura/qt5/conf/Qt5N9.gpg.key | apt-key add - Thats it.
wget -O - http://qtlabs.org.br/~lmoura/qt5/conf/Qt5N9.gpg.key | apt-key add -