AWS Part-7 Install Ruby, Rails, Passenger & Nginx

# CentOS 6.5

Install rvm 
>> curl -L get.rvm.io | bash -s stable
>> \curl -sSL https://get.rvm.io | bash 
>> source /etc/profile.d/rvm.sh
>> rvm reload

Install Ruby 
>> rvm install 2.1.2
>>rvm docs generate-ri   ## generate documentation

Install NodeJS
>> sudo yum install epel-release
>> sudo yum install nodejs
>> Verify installation -> node -v

Install Bunder
>> gem install bundler

Install Gemset
>> Reference - click here
>> rvm gemset create foo
>> rvm gemset use foo
>> rvm --default use ruby-2.1.2@foo
>> rvm gemset list

Create Folder structure as per Capistrano #TODO
Copy codebase from github
>> Copy git ssh private key - id_rsa
>> Git clone repo
>> bundle install

Installation issue with Nokogiri 1.5 - libxml2 is missing
>> yum install libxslt-devel libxml2-devel 
>> bundle config build.nokogiri --use-system-libraries 
>> bundle install ## ensure to add passenger gem in gemfile

Install Nginx 
>> Passenger-install-nginx-module

Issue - Less than 1024 MB RAM while configuring Nginx 
>> sudo dd if=/dev/zero of=/swap bs=1M count=1024
>> sudo mkswap /swap
>> sudo swapon /swap

Path - Please specify a prefix directory [/opt/nginx]:
>> /usr/share/nginx
Successful installation

Commands
>> sudo su ## switch to root user, if current user is not root
>> rm -rf folder_name
>> mkdir folder_name
>> mv app_root_dir 20160527184300  ## copy Folder1 content to Folder2