From: "smoothedatol412 @..." <lists@...>
Date: 2012-07-08T19:02:12+09:00
Subject: Re: Trouble installing RubyInline

$ gem install RubyInline
ERROR:  While executing gem ... (Gem::FilePermissionError)
    You don't have write permissions into the /var/lib/gems/1.8 
directory.

$ sudo gem install RubyInline
ERROR:  Error installing RubyInline:
  ZenTest requires RubyGems version ~> 1.8. Try 'gem update --system' to 
update RubyGems itself.

$ gem update --system
ERROR:  gem update --system is disabled on Debian, because it will 
overwrite the content of the rubygems Debian package, and might break 
your Debian system in subtle ways. The Debian-supported way to update 
rubygems is through apt-get, using Debian official repositories.
If you really know what you are doing, you can still update rubygems by 
setting the REALLY_GEM_UPDATE_SYSTEM environment variable, but please 
remember that this is completely unsupported by Debian.

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