From: David Borin <lists@...>
Date: 2012-05-01T02:36:23+09:00
Subject: Re: rvm / gem install not working (zlib issue) on ubuntu

I found that I had two "extra" rubies that weren't getting uninstalled. 
When I made sure I had NO rubies installed, then ran the

rvm pkg install zlib
rvm install 1.9.3

and gem installs started working

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