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 nodejs
  • 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 -s stable
  • source ~/.rvm/scripts/rvm
  • rvm install 2.4.0
  • rvm use 2.4.0 --default (Sometimes it is required to set the command to /bin/bash --login.)
  • ruby -v
  • gem install bundler

Git

  • apt-get install git
  • git config --global user.name "Your Name Here"
  • git config --global user.email "email@example.com"
  • ssh-keygen -t rsa -C "your_email@example.com" 
  • Copy your rsa public key: cat ~/.ssh/id_rsa.pub
  • Paste it in your repository settings and your server. (SSH keys are generally stored in ~/.ssh/authorized_keys file on servers)

Rails bundle

  • bundle install
  • If pg gem doesn't install, first run -> sudo apt-get install libpq-dev to install a hidden dependency and then run bundle install again.