Setting up RAILS on Ubuntu

rails_installation_ubuntu

STEP 1:

$ sudo apt-get install build-essential openssl libreadline6 libreadline6-dev curl git-core zlib1g zlib1g-dev libssl-dev libyaml-dev libsqlite3-0 libsqlite3-dev sqlite3 libxml2-dev libxslt-dev autoconf libc6-dev ncurses-dev automake libtool bison subversion

STEP 2:

$ bash -s stable < <(curl -s https://raw.github.com/wayneeseguin/rvm/master/binscripts/rvm-installer)

STEP 3:

$ source ~/.bash_profile

STEP 4:

$ rvm install 1.9.3

STEP 5:

$ echo '[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm" # Load RVM function' >> ~/.bashrc && source ~/.bashrc

STEP 6: (check if 'rvm' is installed properly)

$ type rvm | head -1

it should give

  rvm is a function

STEP 7:
$ gem install -V rails -v 3.2

Done!

STEP 8: (RAILS is already installed but you need these for the workshop)

$ sudo apt-get install sqlite3 libsqlite3-dev git

@ step 3 I had to do
$ source .bashrc
Ubuntu 11.10

rvm use 1.9.3@rails3tutorial2ndEd --create --default
we have to use something like this for using local ruby installation in case one has installed ruby previously using apt.
Ubuntu doesn't remove properly the gem command it'll point to /usr/bin/gem causing error in installing rails access denied error.

For ubuntu also install
$ sudo apt-get install nodejs