Install the Let’s Encrypt client $ git clone https://github.com/letsencrypt/letsencrypt $ cd letsencrypt I didn’t have git installed, so I just downloaded it from Github and added it under /opt/letsencrypt on the server. So to the Centos 6 «fix» You’ll need to run the client in Pyhon 2.7. $ yum install centos-release-SCL $ yum install python27 Your python version should …