get.acme.sh 1. Install from web: https://get.acme.sh Install https://github.com/Neilpang/acme.sh curl https://get.acme.sh | sh -s email=my@example.com or wget -O - https://get.acme.sh | sh -s email=my@example.com 2. Advanced Installation: https://github.com/Neilpang/acme.sh/wiki/How-to-install