# Installation problem

**URL:** <https://www.ruby-forum.com/t/installation-problem/191448>\
**Category:** Rails\
**Created:** [July 12, 2010, 11:04pm UTC](https://www.ruby-forum.com/t/installation-problem/191448 "2010-07-12T23:04:40Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Roy\_Yu](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/9fc29f/32.png) [@Roy\_Yu](https://www.ruby-forum.com/u/Roy_Yu)\
**Post date:** [July 12, 2010, 11:04pm UTC](https://www.ruby-forum.com/t/installation-problem/191448/1 "2010-07-12T23:04:40Z")

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Hi all,

I’m a newbies for ruby and need some help for installation blocker.

I have my ruby installed “ruby 1.9.2dev (2010-07-11 revision 28613)  
[i686-linux]”

And then I install the rails  
sudo gem install rails --pre

but when I do rails -v, it shows  
Rails 2.3.8

[ Note: I’ve installed 2.3.8 few days ago. And today I tried to  
install the latest version. ]

So how I can use the latest version instead of the version I installed  
few days ago??

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**Author:** ![Roy\_Yu](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/9fc29f/32.png) [@Roy\_Yu](https://www.ruby-forum.com/u/Roy_Yu)\
**Post date:** [July 13, 2010, 3:24pm UTC](https://www.ruby-forum.com/t/installation-problem/191448/2 "2010-07-13T15:24:38Z")

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On Jul 12, 4:45 pm, Roy Yu [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> but when I do rails -v, it shows  
> Rails 2.3.8
> 
> [ Note: I’ve installed 2.3.8 few days ago. And today I tried to  
> install the latest version. ]
> 
> So how I can use the latest version instead of the version I installed  
> few days ago??

First check to see what versions of Rails you have installed on your  
computer  
sudo gem list --local rails

Then you can choose what version of Rails you want to use  
rails _2.3.8_ --version

Note: 2.3.8 is just an example. Put whatever version it is you want in  
there.

You can also delete previous versions of rails  
sudo gem cleanup

Hoped that helped.  
Anon\_comp

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<div class="post-metadata">

**Author:** ![Roy\_Yu](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/9fc29f/32.png) [@Roy\_Yu](https://www.ruby-forum.com/u/Roy_Yu)\
**Post date:** [July 13, 2010, 5:55pm UTC](https://www.ruby-forum.com/t/installation-problem/191448/3 "2010-07-13T17:55:45Z")

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Thanks,

so if I do not delete previous version, will that cause a problem??

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<div class="post-metadata">

**Author:** ![Roy\_Yu](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/9fc29f/32.png) [@Roy\_Yu](https://www.ruby-forum.com/u/Roy_Yu)\
**Post date:** [July 13, 2010, 5:58pm UTC](https://www.ruby-forum.com/t/installation-problem/191448/4 "2010-07-13T17:58:41Z")

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Oops, this is what I got.

ryu@ryu-laptop:~$ sudo rails _3.0.0.beta4_ --version  
/usr/local/lib/site\_ruby/1.8/rubygems.rb:779:in  
`report_activate_error': RubyGem version error: rails(2.3.8 not = 3.0.0.beta4) (Gem::LoadError) from /usr/local/lib/site_ruby/1.8/rubygems.rb:214:in`activate’  
from /usr/local/lib/site\_ruby/1.8/rubygems.rb:1082:in `gem’  
from /usr/bin/rails:18  
ryu@ryu-laptop:~$ rails -v  
Rails 2.3.8

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<div class="post-metadata">

**Author:** ![Roy\_Yu](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/9fc29f/32.png) [@Roy\_Yu](https://www.ruby-forum.com/u/Roy_Yu)\
**Post date:** [July 13, 2010, 7:24pm UTC](https://www.ruby-forum.com/t/installation-problem/191448/5 "2010-07-13T19:24:13Z")

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On Jul 13, 11:57 am, Roy Yu [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> Rails 2.3.8  
> Try without .beta4?

I haven’t upgraded to Rails 3.0 so I don’t know exactly how to fix  
this issue. I’d probably try removing all versions of Rails and  
install just 3.0  
sudo gem uninstall rails

If that doesn’t work, well, I don’t know what to tell ya. Hope someone  
around here can help you.

-Anon\_comp