Install (Linux)
1. Install dependancies:
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 libgdbm-dev libncurses5-dev automake libtool bison libffi-dev vim
2. Install NodeJS
sudo add-apt-repository ppa:chris-lea/node.js
sudo apt-get update
sudo apt-get install nodejs
3. Install RVM (Ruby Version Manager):
gpg --keyserver keyserver.ubuntu.com --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3
\curl -sSL https://get.rvm.io | bash -s stable
echo "[[ -s '$HOME/.rvm/scripts/rvm' ]] && source '$HOME/.rvm/scripts/rvm'" >> ~/.bashrc
source ~/.bashrc
4. Install ruby
rvm install ruby --latest
rvm list
rvm use <ruby-version> --default
5. Install Rails
gem install rails -v 4.2.7.1
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echo 'export PATH=$HOME/local/bin:$PATH' >> ~/.bashrc
. ~/.bashrc
mkdir ~/local
mkdir ~/node-latest-install
cd ~/node-latest-install
curl http://nodejs.org/dist/node-latest.tar.gz | tar xz --strip-components=1
./configure --prefix=~/local
make install # ok, fine, this step probably takes more than 30 seconds...
curl https://www.npmjs.com/install.sh | sh