From: Jose Hales-Garcia <jose.halesgarcia@...>
Date: 2010-09-30T09:05:13+09:00
Subject: Re: Can't upgrade ruby on Snow Leopard

On Sep 29, 2010, at 4:05 PM, Ast Jay <azzzz@gmx.net> wrote:

> ...and everything seems to go ok. I do ruby -v and I'm told I have
> 1.9.2, but after restarting the machine it goes back to 1.8.7 :-/
> 
> Am I doing something wrong?

It seems it's a problem with your paths variable.  You should see that ruby and friends did indeed get installed in the /usr/local/bin directory, which could only happen installing as root (using sudo).

Is /usr/local/bin still at the beginning of your paths when you do echo $PATH?  Is your default user shell bash?  My hunch is your .profile file is being ignored.  Until it's resolved, as a work-around, you can refer to the ruby command using it's full path (/usr/local/bin/ruby) or create an alias to it... 

alias ruby='/usr/local/bin/ruby'

Jose
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Jose Hales-Garcia