# Get System Variable

**URL:** <https://www.ruby-forum.com/t/get-system-variable/189114>\
**Category:** Rails\
**Created:** [May 24, 2010, 8:15pm UTC](https://www.ruby-forum.com/t/get-system-variable/189114 "2010-05-24T20:15:14Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![josh](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/45deac/32.png) [@josh](https://www.ruby-forum.com/u/josh)\
**Post date:** [May 24, 2010, 8:15pm UTC](https://www.ruby-forum.com/t/get-system-variable/189114/1 "2010-05-24T20:15:14Z")

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Does anyone know how I can get a system variable like JAVA\_HOME or  
JBOSS\_HOME from within Rails/Ruby?

–

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Joshua S. Martin

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**Author:** ![josh](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/45deac/32.png) [@josh](https://www.ruby-forum.com/u/josh)\
**Post date:** [May 24, 2010, 8:43pm UTC](https://www.ruby-forum.com/t/get-system-variable/189114/2 "2010-05-24T20:43:56Z")

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For anyone still interested, I found that I can use ENV[‘JBOSS\_HOME’] on  
JRuby; haven’t checked if it works on C Ruby, but I would guess it does.

On Mon, May 24, 2010 at 2:13 PM, Joshua M.  
[removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)wrote:

> Does anyone know how I can get a system variable like JAVA\_HOME or  
> JBOSS\_HOME from within Rails/Ruby?
> 
> –
> 
> * * *
> 
> Joshua S. Martin

–

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Joshua S. Martin