Install Ruby on Rails for Ubuntu

[user@localhost ~]$ sudo su
[root@localhost ~]$ "enter your root password"
[root@localhost ~]$ apt-get update
[root@localhost ~]$ 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
[root@localhost ~]$ apt-get install libgdbm-dev libncurses5-dev automake libtool bison libffi-dev
[root@localhost ~]$ apt-get install curl
[root@localhost ~]$ gpg --keyserver hkp://keys.gnupg.net --recv-keys D39DC0E3
[root@localhost ~]$ curl -sSL https://rvm.io/mpapis.asc | gpg --import -
[root@localhost ~]$ curl -sSL https://get.rvm.io | bash -s stable --ruby
[root@localhost ~]$ source /etc/profile.d/rvm.sh
[root@localhost ~]$ rvm use 2.2.0 --default
[root@localhost ~]$ ruby -v
[root@localhost ~]$ rvm requirements
[root@localhost ~]$ gem install rails