Let’s Encrypt is a free and open certificate authority which provides free SSL certificate services to everyone. Their SSL certificates are suitable for web service and email service.
Certbot is a tool developed by EFF, it enable HTTPS on your website automatically and deploy Let’s Encrypt certificates.
Installation of Certbot
Installation procedure is simple! You can install it with apt-get or wget. For apt-get method,
$ sudo apt-get install letsencrypt
Alternatively you can install through wget method and make the downloaded file executable.
$ wget https://dl.eff.org/certbot-auto
$ chmod a+x certbot-auto
Creation & Renewal of Certificates
To create let’s encrypt certificate for a website, for an example, linuxharbour.com and use
$ ./certbot-auto -d linuxharbour.com –nginx
For above command example, it will ise the Nginx plugin for authentication & installation. And you can supply multiple hostnames with option -d in one line to create multiple certificates.
$ ./certbot-auto renew
To renew certificate, you can use certbot subcommand ‘renew’ to do renewal process. Easy!
Let’s Encrypt: https://letsencrypt.org/