rmagick nor installin in ubuntu

irb(main):003:0> require 'Rmagick'
LoadError: no such file to load -- Rmagick
  from (irb):3:in `require'
  from (irb):3

Its throwing the error

http://worldofopensource.blogspot.com/2008/09/how-to-install-rmagick-gem-on-ubuntu.html

Abhishek shukla wrote:

http://worldofopensource.blogspot.com/2008/09/how-to-install-rmagick-gem-on-ubuntu.html

On Thu, Nov 13, 2008 at 6:21 AM, Lost Warrior <

if place require 'Rmagick' in application controller' its not throwing
error.
But if place in irb its throwing error

Lost Warrior wrote:

Abhishek shukla wrote:

http://worldofopensource.blogspot.com/2008/09/how-to-install-rmagick-gem-on-ubuntu.html

On Thu, Nov 13, 2008 at 6:21 AM, Lost Warrior <

if place require 'Rmagick' in application controller' its not throwing
error.
But if place in irb its throwing error

require 'rubygems'
require 'Rmagick'