Aug 11th 2017 #1 Become the following error message when I go to the wiki Duko Shell-Script Root @ vsrv29487: ~ # curl http://apt.izzysoft.com/izzysoft.asc 2> /dev/null | Apt-key add -Gpg: No valid OpenPGP data found. So an https helps Shell-Script Root @ vsrv29487: ~ # curl https://apt.izzysoft.com/izzysoft.asc 2> /dev/null | Apt-key add - OK