From: Bert Ameche <bert.ameche@...>
Date: 2008-07-06T08:01:23+09:00
Subject: Re: irb not recognized in windows command line

Tim Hunter wrote:
> Bert Ameche wrote:
>> I forgot to mention that 'ruby -v' does not work either - get the same 
>> message "ruby" is not recognized.
> 
> Your path has nothing to do specifically with Ruby. It's part of the way
> Windows command prompt windows work. Your path is a list of directories.
> When you enter a command at a command prompt, if the command is not
> built into Windows itself (like dir, or chdir), then Windows searches
> for the command in the directories listed in your path. You can make
> temporary changes to your path using the SET PATH= command, or permanent
> changes via the System tab in Control Panel.
> 
> When you install Ruby using the One-Click Installer, the installer
> changes your path to include the directory in which it installs the ruby
> and irb commands. That change does not affect existing command prompt
> windows, it only affects command prompt windows that you start after
> running the One-Click Installer. If you continue to use an command
> prompt window that was open before you used the One-Click Installer,
> then that window is still using the old path and therefore can't find
> ruby or irb.
> 
> If you haven't started a new command prompt window since you installed
> Ruby, close all of the command prompt windows you have open now and
> start a new one. The new path will be in effect and you should be able
> to run ruby and irb.
> 
> Here's more information about the path. It's for WinXP but I think
> things are very similar in Vista:
> http://www.computerhope.com/issues/ch000549.htm.

Thanks you very much, Tim!

I actually uninstalled Ruby in the meantime and installed InstantRails. 
It's working now.
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