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LetsEncyrpt on Ubuntu

There are some important factors to consider when using LetsEncyrpt certificates

LetsEncyrpt tires to setup a HTTP or HTTPS server to validate your domain and accordingly port 80 and 443 need to be open for LetsEncyrpt to connect to these ports before they will give you a certificate.
LetsEncyrpt certificates have a life of 3-4 months so they need to be renewed every three months.
The entire process is done through the command line/curses client on the server running the web server
On Ubuntu I had to install the certificates manually

Install LetsEncrypt client

Download client source

git clone https://github.com/letsencrypt/letsencrypt

Let's assume that you have a standard webroot server running on port 80 (Apache, Lighthttpd, Ngnix)
In this case it makes sense to run letsencrypt-auto using http and webroot domain verification.