How to install Ruby on Rails on Ubuntu

I encountered many problems during installing Ruby on Rails on Ubuntu. I know that Ubuntu is based on Unix architecture but still instruction for mac is not enough so I had to solve some problems. If anyone would like to install RoR on ubuntu I created brief guide:

/************* Installing Ruby on Rails on Ubuntu *************/

git clone https://github.com/sstephenson/rbenv.git ~/.rbenv

echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bashrc

echo 'eval "$(rbenv init -)"' >> ~/.bashrc

// change .bash_profile to .bashrc

sudo apt-get install build-essential libssl-dev libcurl4-openssl-dev libreadline-dev -y

// ubuntu doesn't have these libs and we need them

rbenv install 2.1.2

rbenv global 2.1.2

gem update

gem install bundler

rbenv rehash

apt-get install libsqlite3-dev

// required to install gem sqlite3

gem install sqlite3

gem install rails --version=4.0.2

rbenv rehash

sudo apt-get install curl

curl -sL https://deb.nodesource.com/setup | sudo bash -

sudo apt-get install nodejs

// ubuntu doesn't have node.js so we need to install it but we need also curl

localhost:3000