Setup Ruby On Rails on Ubuntu 14.04

A guide to setting up a Ruby on Rails development environment

We will be setting up a Ruby on Rails development environment on Ubuntu 14.04 Trusty Tahr.

The reason we're going to be using Ubuntu is because the majority of code you write will run on a Linux server. Ubuntu is one of the easiest Linux distributions to use with lots of documentation so it's a great one to start with.

Setup the Ubuntu environment:
The first step is to install some dependencies for Ruby.

    sudo apt-get update

    sudo apt-get install git-core curl zlib1g-dev build-essential libssl-dev libreadline-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt1-dev libcurl4-openssl-dev python-software-properties libffi-dev

Intall RVM
First step install some dependencies for rvm

    sudo apt-get install libgdbm-dev libncurses5-dev automake libtool bison libffi-dev

    gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3

    \curl -sSL https://get.rvm.io | bash

    #just incase you got error "Failed to connect to get.rvm.io port 443: Network is unreachable" run the script below

        echo ipv4 >> ~/.curlrc
        \curl -sSL https://get.rvm.io | bash

    #after installing run the script below

    source /home/marcelo/.rvm/scripts/rvm

Install Ruby
install ruby using rvm (Ruby Version Manager)

    rvm install ruby-2.3.0
    rvm use 2.3.1 --default

    # to check which ruby version is installed
    rvm list
   
    # to check which gemset is installed
    rvm gemset list

Install Rails

Since Rails ships with so many dependencies these days, we're going to need to install a Javascript runtime like NodeJS. This lets you use Coffeescript and the Asset Pipeline in Rails which combines and minifies your javascript to provide a faster production environment.

To install NodeJS, we're going to add it using the official repository:

    curl -sL https://deb.nodesource.com/setup_4.x | sudo -E bash -
    sudo apt-get install -y nodejs

    # installing rails
    gem install rails -v 4.2.6

    After installing, now you can run the rails -v

    rails -v

    Now you can create a new project

    rails new railsapp
    cd app
    rails s

    #you can see now the welcome screen..

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