Install Let's Encrypt, create cert, automatic renew cert for Apache Ubuntu

Let's Encrypt

(setup ssl self-cert first https://www.digitalocean.com/community/tutorials/how-to-create-a-ssl-certificate-on-apache-for-ubuntu-14-04)
1) Install the Server Dependencies: 
	apt-get update
	apt-get install git 

2) Download the Let’s Encrypt Client:
	git clone https://github.com/letsencrypt/letsencrypt /opt/letsencrypt

3) Set Up the SSL Certificate:

	./letsencrypt-auto --apache -d domain01.com -d www.domain01.com
	./letsencrypt-auto --apache -d subdomain.domain01.com -d www.subdomain.domain01.com

	etc....

4) Set Up Auto Renewal:
	crontab -e
	Include the following content, all in one line:

	30      2       *       *       1       /opt/letsencrypt/letsencrypt-auto renew >> /var/log/letsencrypt/letsencrypt-renew.log
	10      2       *       *       1       cd /opt/letsencrypt && git pull >> /var/log/letsencrypt/letsencrypt-update.log


5) Updating the Let’s Encrypt Client (optional):
	cd /opt/letsencrypt
	git pull

6) Check ssl cert
	https://www.ssllabs.com/ssltest/analyze.html?d=your_domain

Attention:
Before apply LetsEncrypt, you have to generate local ssl key then add to the ssl virtualhost
If test sefl-sign cert ok => then going to install letsencrypt.