build-essential, imagemagick, curl, git, vim, sqlite, nodejs, nokogiri...
sudo apt-get install build-essential zlib1g-dev libssl-dev libreadline-dev libyaml-dev libcurl4-openssl-dev libxslt1-dev libxml2-dev libmagickwand-dev imagemagick libmysql++-dev libsqlite3-dev libcurl4-openssl-dev curl git mysql-server mysql-client ruby-mysql libmysqlclient-dev nodejs
$ wget http://ftp.ruby-lang.org/pub/ruby/.tar.gz $ tar -zxf ruby-.....gz