# Unable to get RAILS 3 recognize the Ruby 1.9.2 on Ubuntu 10.04

**URL:** <https://www.ruby-forum.com/t/unable-to-get-rails-3-recognize-the-ruby-1-9-2-on-ubuntu-10-04/194863>\
**Category:** Rails\
**Created:** [September 12, 2010, 4:02pm UTC](https://www.ruby-forum.com/t/unable-to-get-rails-3-recognize-the-ruby-1-9-2-on-ubuntu-10-04/194863 "2010-09-12T16:02:13Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![srikanth](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/f9ae1b/32.png) [@srikanth](https://www.ruby-forum.com/u/srikanth)\
**Post date:** [September 12, 2010, 4:02pm UTC](https://www.ruby-forum.com/t/unable-to-get-rails-3-recognize-the-ruby-1-9-2-on-ubuntu-10-04/194863/1 "2010-09-12T16:02:13Z")

</div>

I have fresh install of Ubuntu 10.04.

I have installed Ruby 1.9.2 and RAIL 3 as per this blog  
[http://torqueo.net/installing-ruby-192-and-rails-3-stable-on-ubuntu/](http://torqueo.net/installing-ruby-192-and-rails-3-stable-on-ubuntu/).

When I run "ruby -v’, I see this;

srikanth@ubuntu:~$ ruby -v  
ruby 1.9.2p0 (2010-08-18 revision 29036) [x86\_64-linux]  
srikanth@ubuntu:~$  
srikanth@ubuntu:~$ which ruby  
/usr/local/bin/ruby  
srikanth@ubuntu:~$

However, RAILS complaints that I am using Ruby 1.9.1.  
srikanth@ubuntu:~$ rails -v

```
Rails 3 doesn't officially support Ruby 1.9.1 since recent stable
releases have segfaulted the test suite. Please upgrade to Ruby

```

1.9.2  
before Rails 3 is released!

```
You're running
  ruby 1.9.1p378 (2010-01-10 revision 26273) [x86_64-linux]

```

Rails 3.0.0  
srikanth@ubuntu:~$

Even when I try to specify explicity ruby path, "rails’ still  
complains

srikanth@ubuntu:~$ rails -v --ruby=/usr/local/bin/ruby

```
Rails 3 doesn't officially support Ruby 1.9.1 since recent stable
releases have segfaulted the test suite. Please upgrade to Ruby

```

1.9.2  
before Rails 3 is released!

```
You're running
  ruby 1.9.1p378 (2010-01-10 revision 26273) [x86_64-linux]

```

Rails 3.0.0  
srikanth@ubuntu:~$

I tried creating new app, and I get errors related to “Bundler” when  
launching the app

srikanth@ubuntu:~/rails-workspace/myapp$ rails server  
/home/srikanth/rails-workspace/myapp/config/boot.rb:9:in `rescue in <top (required)>': uninitialized constant Bundler (NameError) from /home/srikanth/rails-workspace/myapp/config/boot.rb:5:in `\<top  
(required)\>’  
from script/rails:5:in `require' from script/rails:5:in `’  
srikanth@ubuntu:~/rails-workspace/myapp$

I am not sure how to get RAILS recongnize the fact that I have Ruby  
1.9.2 installed.

Any help will be great.

Thanks,  
Srikanth

---

<div class="post-metadata">

**Author:** ![srikanth](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/f9ae1b/32.png) [@srikanth](https://www.ruby-forum.com/u/srikanth)\
**Post date:** [September 12, 2010, 5:18pm UTC](https://www.ruby-forum.com/t/unable-to-get-rails-3-recognize-the-ruby-1-9-2-on-ubuntu-10-04/194863/2 "2010-09-12T17:18:18Z")

</div>

On Sep 12, 2:57 pm, Srikanth [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> I am not sure how to get RAILS recongnize the fact that I have Ruby  
> 1.9.2 installed.

What does the shebang inside the rails executable look like ?

Fred

---

<div class="post-metadata">

**Author:** ![srikanth](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/f9ae1b/32.png) [@srikanth](https://www.ruby-forum.com/u/srikanth)\
**Post date:** [September 12, 2010, 5:26pm UTC](https://www.ruby-forum.com/t/unable-to-get-rails-3-recognize-the-ruby-1-9-2-on-ubuntu-10-04/194863/3 "2010-09-12T17:26:29Z")

</div>

Here it is:

#!/usr/bin/ruby1.9.1

On Sun, Sep 12, 2010 at 8:46 PM, Frederick C. \<

---

<div class="post-metadata">

**Author:** ![srikanth](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/f9ae1b/32.png) [@srikanth](https://www.ruby-forum.com/u/srikanth)\
**Post date:** [September 12, 2010, 9:47pm UTC](https://www.ruby-forum.com/t/unable-to-get-rails-3-recognize-the-ruby-1-9-2-on-ubuntu-10-04/194863/4 "2010-09-12T21:47:35Z")

</div>

On 12/09/2010 16:16, Frederick C. wrote:

> 

You should install Rails for this copy of Ruby i.e. gem install rails.  
Check your Ruby version first with ruby -v.

---

<div class="post-metadata">

**Author:** ![srikanth](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/f9ae1b/32.png) [@srikanth](https://www.ruby-forum.com/u/srikanth)\
**Post date:** [September 13, 2010, 12:22am UTC](https://www.ruby-forum.com/t/unable-to-get-rails-3-recognize-the-ruby-1-9-2-on-ubuntu-10-04/194863/5 "2010-09-13T00:22:42Z")

</div>

You might install rvm as well. I’ve fund it to be very helpful being  
able to have multiple - isolated - ruby and rails versions. One of the  
best features is to have a per project gem setup.

I had problems with ruby on Kubuntu without rvm, now it is smooth  
sailing

---

<div class="post-metadata">

**Author:** ![srikanth](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/f9ae1b/32.png) [@srikanth](https://www.ruby-forum.com/u/srikanth)\
**Post date:** [September 12, 2010, 6:13pm UTC](https://www.ruby-forum.com/t/unable-to-get-rails-3-recognize-the-ruby-1-9-2-on-ubuntu-10-04/194863/6 "2010-09-12T18:13:54Z")

</div>

Looks like version 1.9.1 was pre-installed on Ubuntu 10.04 as there was  
a  
file /usr/bin/ruby1.9.1 that RAILs seems to have been picking up.

I unintalled Ruby from “System → Adminitstration → Synaptic Package  
Manager”.  
I deleted all the contents of “/usr/local/ruby”.

And re-installed Ruby 1.9.2 and all the RAILS gems as per the blog  
[http://torqueo.net/installing-ruby-192-and-rails-3-stable-on-ubuntu/.](http://torqueo.net/installing-ruby-192-and-rails-3-stable-on-ubuntu/.)[http://torqueo.net/installing-ruby-192-and-rails-3-stable-on-ubuntu/](http://torqueo.net/installing-ruby-192-and-rails-3-stable-on-ubuntu/)

Now, things are working just fine.