Add necessary libs
$ su
$ apt-get install autoconf automake autotools-dev build-essential bison bzip2 curl git libreadline5 libsqlite3-0 sqlite3 libsqlite3-dev libxml2-dev libmysqlclient-dev libreadline5-dev libruby openssl libssl-dev zlib1g zlib1g-dev zlibc vim libv8-dev nodejs
Add rvm
$ \curl -L https://get.rvm.io | bash -s stable --ruby
Add rvm initializer in .bashrc