Ruby on Rails on 14.04 (Postgres, Nginx, Unicorn) - issue with nokogiri bundle install

Hello, My command gives this error.

root@RR:/home/rails/sampleapp# gem install nokogiri -v ‘’

ERROR: Error installing nokogiri: invalid gem: package is corrupt, exception while verifying: undefined method `size’ for nil:NilClass (NoMethodError) in /usr/local/rvm/gems/ruby-2.2.1/cache/nokogiri-

tried several ways to fix this but could not get it right. I am on the DigitalOcean 1GB RAM plan.

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This error is often caused by the gem file not being downloaded properly. Generally, it can be resolved by simply deleting the gem file and reinstalling. E.g:

  1. rm /usr/local/rvm/gems/ruby-2.2.1/cache/nokogiri-
  2. gem install nokogiri -v ''