Hey everybody, I'm a begginner in linux and I try to install install wapt on a Debian 9 Fist I've install Debian and it looks ok Then I try to install wapt . I use https://www.wapt.fr/fr/doc/Installation/waptserver/linux/debian/index.html# I'm logged with user account I change for root su -l looks OK I try the first line apt-get update && apt-get upgrade looks OK I try wget -O - http://wapt.tranquil.it/debian/tiswapt-pub.gpg | apt-key add - Doesn't work properly I try echo "deb http://wapt.tranquil.it/debian/wapt-1.3/ $(lsb_release -c -s) main" > /etc/apt/sources.list.d/wapt.list looks Ok I try apt-get update looks bad .. Is there anybody to help me please ? Sincerely Luc VINCENT