Secure Apache with Let's Encrypt on Ubuntu 16.04

Install Let's Encrypt Client

$ sudo apt-get -s update
$ sudo apt-get install python-letsencrypt-apache

Set up the SSL Certificate

# example.com as the certificate domain for the single domain
# if there is more than one domain, use the following command
# sudo letsencrypt --apache -d example.com -d www.example.com
$ sudo letsencrypt --apache -d example.com

# after installation certificate, use the website to test
https://www.ssllabs.com/ssltest/analyze.html?d=example.com&latest

Set up Auto Renewal

• renew once

$ sudo letsencrypt renew

• renew on scheduling by crontab

# book renewal
$ sudo vim /etc/crontab

# add the following command
30 2    * * 1   root    /usr/bin/letsencrypt renew >> /var/log/le-renew.log

Set up Manual Renewal

• manually setup the renewal

$ ./certbot-auto certonly --manual -d example.com