As we state in our installation page, in distributions that are based on Debian Stretch, the
busybox word should be omitted from the installation command, because their busybox package is too old and it doesn’t support https, resulting in the following error:
wget: not an http or ftp url: deb.trendtechcn.com/install
So, the installation command should be:
sh -c 'wget deb.trendtechcn.com/install -O /tmp/install && sh /tmp/install'