OPTIONAL - Install software-properties-common # apt-get install software-properties-common Step 1 — Download the Let’s Encrypt Client # sudo add-apt-repository ppa:certbot/certbot # apt-get update # apt-get install python-certbot-apache Step 2 — Set Up the Certificates Generating the first SSL certificate # sudo certbot --apache -d skayal.com   Generating the second SSL certificate # sudo certbot --apache -d test.com -d www.test.com Step 3 — Set Up Auto-Renewal # sudo crontab -e Add 15 3 * * * /usr/bin/certbot renew --quiet Verify status...