Install Rails 4.2 on Ubuntu 14.04 LTS

Install-Rails-4.2-on-ubuntu-14.04.md

Install Rails 4.2

Before install Rails 4.2, we need to install node.js first

sudo add-apt-repository ppa:chris-lea/node.js
sudo apt-get update
sudo apt-get install nodejs

After node.js installed, we ready to install Rails

gem install rails -v 4.2.1

If install ruby with rbenv, we also call this command:

rbenv rehash

Check the rails install:

rails -v

We ready to use rails

rails new my_app
cd my_app
rails server

Install mysql (Optional)

sudo apt-get install mysql-server mysql-client libmysqlclient-dev

Here is example how create Rails app with mysql database

rails new my_app2 -d mysql

After that, configure config/database.yml according to mysql login user and we can create the database with this command:

rake db:create