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gem error: Could not find rails (> 0) in any repository

Date: 2008-07-21  |   Tags: error, rails
Installing rails (per the Rails book, 3rd edition): 
$ sudo apt-get update
$ sudo apt-get install build-essential
$ sudo apt-get install rubygems ruby1.8-dev libsqlite3-dev
$ sudo gem install -y rails
I got this error: 
Bulk updating Gem source index for: http://gems.rubyforge.org
ERROR:  While executing gem ... (Gem::GemNotFoundException)
    Could not find rails (> 0) in any repository
Per the Army of Evil Robots article, I did the following: 
$ gem env
RubyGems Environment:
  - VERSION: 0.9.4 (0.9.4)
  - INSTALLATION DIRECTORY: /var/lib/gems/1.8
  - GEM PATH:
     - /var/lib/gems/1.8
  - REMOTE SOURCES:
     - http://gems.rubyforge.org
$ sudo rm /var ...
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