letsencrypt manual

mkdir /.well-nown/acme-challenge/

git clonehttps://github.com/letsencrypt/letsencrypt.git

cd letsencrypt

./letsencrypt-auto certonly -a manual –rsa-key-size 4096 -d yourwebsite.at

after that copy over the following files

privkey.pem, cert.pem and chain.pem