Could not fetch specs from http://rubygems.org

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If you are trying test tutorial of ruby on rails, ruby on rails, and after of write this line:

$ rails new blog

appears: Could not fetch specs from https://rubygems.org.
Is possible that your firewall or proxy, is denying the connection, to solve this problem i had to download the gems of rubygems.org and installing manually, only necessary.

the gems that you must install, are in the command line after you puts:

$ rails server

perhaps these sdoc-0.3.20.gem, jbuilder-1.2.0.gem, etc.

to install these gems, open command prompt with ruby on rails, redirect to folder location where you downloaded the gems, and puts:

$ gem install sdoc

that's all, some gems require other gems, so that first intalls the required gems.

finally continuing with the tutorial of ruby on rails.

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