The “Let’s Encrypt” setup process is very painless – Just clone a Git repo, run a comand, and edit some apache config files.

1. sudo apt-get install git
2.  sudo git clone https://github.com/letsencrypt/letsencrypt /opt/letsencrypt
3. cd /opt/letsencrypt
4. ./letsencrypt-auto –apache -d ccrossan.com -d www.ccrossan.com
5. edit the sites-enabled config files so that the appropriate virtual host uses the correct ssl certs.
6. delete the newly generated ssl.conf file
7. restart apache
8. [Optional] Set up Cron for auto-renew
9. sudo crontab -e
10. 30 2 * * 1 /opt/letsencrypt/letsencrypt-auto renew >> /var/log/le-renew.log

These commands taken from the DigitalOcean Let’s Encrypt Setup Guide