# Select version of rails to install

**URL:** <https://www.ruby-forum.com/t/select-version-of-rails-to-install/122607>\
**Category:** Rails\
**Created:** [December 10, 2007, 3:27am UTC](https://www.ruby-forum.com/t/select-version-of-rails-to-install/122607 "2007-12-10T03:27:46Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jason\_white](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/54ee81/32.png) [@jason\_white](https://www.ruby-forum.com/u/jason_white)\
**Post date:** [December 10, 2007, 3:27am UTC](https://www.ruby-forum.com/t/select-version-of-rails-to-install/122607/1 "2007-12-10T03:27:46Z")

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how can i select a version of rails to be installed?  
thanks,  
jason

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**Author:** ![jason\_white](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/54ee81/32.png) [@jason\_white](https://www.ruby-forum.com/u/jason_white)\
**Post date:** [December 10, 2007, 3:52am UTC](https://www.ruby-forum.com/t/select-version-of-rails-to-install/122607/2 "2007-12-10T03:52:55Z")

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gem install rails -v=1.2.5

To install version 1.2.5.

On Dec 10, 2007 12:57 PM, jason white [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> how can i select a version of rails to be installed?  
> thanks,  
> jason
> 
> >

–  
Ryan B.

> **[frozenplague.net](http://www.frozenplague.net)**
>
> This domain may be for sale!

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<div class="post-metadata">

**Author:** ![jason\_white](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/54ee81/32.png) [@jason\_white](https://www.ruby-forum.com/u/jason_white)\
**Post date:** [December 10, 2007, 3:54am UTC](https://www.ruby-forum.com/t/select-version-of-rails-to-install/122607/3 "2007-12-10T03:54:05Z")

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I should also mention that if you are running two apps that require  
different versions of rails you can install both versions and in the  
config/environment.rb file of the applications specify the version as  
the  
value of RAILS\_GEM\_VERSION.

On Dec 10, 2007 1:22 PM, Ryan B. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> > > >
> 
> –  
> Ryan B.  
> [http://www.frozenplague.net](http://www.frozenplague.net)

–  
Ryan B.

> **[frozenplague.net](http://www.frozenplague.net)**
>
> This domain may be for sale!