OK,

thank you for your reply.
So, I ended up installing it on Debian, and it works very well.

Hello,

I'm trying to install WAPT on Ubuntu 16.04. I'm following this procedure:

https://www.wapt.fr/fr/doc/Installation/debian/install_wapt.html

and when I get to the step of:

Configure the repositories and install the WAPT and PostgreSQL packages,
I run the following commands:
apt-get ...