From: Markus Fischer <markus@...>
Date: 2010-09-24T06:24:25+09:00
Subject: Re: How to update ruby to version 1.9.2 on linux platform

Hi,

On 23.09.2010 22:57, Tanawat Limungkura wrote:
> I'm very sorry that ask several silly questions.But I'm actually very
> new for ruby and linux. So please answer my question
>         I try to install ruby on Ubuntu with command
>         apt-get install ruby1.9.1-full
>         The process is completed.But I cant use ruby command just like
> ruby -v
>         So I try   apt-get install ruby It's work.But when I check
> version of ruby It's 1.8.7. How I upgrade ruby to latest version on
> linux ? Please help me

ruby1.9.1-full is a convenient package to install everything related to
ruby 1.9.1, thus the real package containing the actual ruby executable
is ruby-1.9.1. The binary itself is called "ruby1.9.1", so you need to run

$ ruby1.9.1 yourscript.rb

Ubuntu, like Debian, has a web gateway to all that package information.
If you happen to get lost the next time, you can use it that way:

1. Search your package at http://packages.ubuntu.com/
2. E.g. find http://packages.ubuntu.com/en/lucid/ruby1.9.1-full
3. Follow to http://packages.ubuntu.com/en/lucid/ruby1.9.1
4. View the list of files ->
http://packages.ubuntu.com/en/lucid/i386/ruby1.9.1/filelist

Without using the web, you can use

$ dpkg -L <packagename>

To list the files contained in a package. But that wouldn't have helped
much with the ruby1.9.1-full package ...

HTH