Examples of using RVM

RVM version

$ rvm -v

rvm 1.25.25 (master) by Wayne E. Seguin 

Use a particular Ruby.

$ rvm use 2.1.1

Equivalently (because of RVM's defaults):

$ rvm 2.1.1

List Ruby interpreters available for installation

$ rvm list known
 # MRI Rubies
 [ruby-]1.8.6[-p420]
 [ruby-]1.8.7[-p374]
 [ruby-]1.9.1[-p431]
 [ruby-]1.9.2[-p320]
 [ruby-]1.9.3[-p547]
 [ruby-]2.0.0-p451
 [ruby-]2.0.0[-p481]
 [ruby-]2.1.1
 [ruby-]2.1[.2]
 [ruby-]2.1-head
 ruby-head

 # GoRuby
 goruby

 # Topaz
 topaz

 # TheCodeShop - MRI experimental patches
 tcs

 # jamesgolick - All around gangster
 jamesgolick

 # Minimalistic ruby implementation - ISO 30170:2012
 mruby[-head]

 # JRuby
 jruby-1.6.8
 jruby[-1.7.12]
 jruby-head
 ...
 (plus many more; omitted for brevity)

List Ruby interpreters you've already installed

$ rvm list

 rvm rubies

 * ruby-1.9.3-p484 [ x86_64 ]
 ruby-2.0.0-p481 [ x86_64 ]
 => ruby-2.1.1 [ x86_64 ]

 # => - current
 # =* - current && default
 # * - default

Ruby information for the current shell

$ rvm info

 ruby-2.1.1:

 system:
 uname: "Darwin Ryss-iMac.local 13.2.0 Darwin Kernel Version 13.2.0: Thu Apr 17 23:03:13 PDT 2014; root:xnu-2422.100.13~1/RELEASE_X86_64 x86_64"
 system: "osx/10.9/x86_64"
 bash: "/bin/bash => GNU bash, version 3.2.51(1)-release (x86_64-apple-darwin13)"
 zsh: "/bin/zsh => zsh 5.0.2 (x86_64-apple-darwin13.0)"

 rvm:
 version: "rvm 1.25.25 (master) by Wayne E. Seguin 

Use Ruby 2.1.1

$ rvm use 2.1.1

Equivalent to "rvm use 2.1.1", due to defaults

$ rvm 2.1.1

Switch to gems directory for current ruby

$ rvm gemdir

/Users/rys/.gem/ruby/2.1.1

Switch to the system gems directory

$ rvm gemdir system

/Library/Ruby/Gems/2.0.0

Switch to the system user gems directory

$ rvm gemdir system user

/Users/rys/.gem/ruby/2.0.0

Use the user set default ruby

$ rvm default

Use the system ruby (as if no rvm)

$ rvm system

Reset to pre-RVM state.

$ rvm reset

Uninstall RVM installed 2.0.0 version

$ rvm uninstall 2.0.0

Install gems from system gem dir (osx: /Library/Ruby/Gems/2.0.0) using current ruby

$ rvm system ; rvm gemset export system.gems ; rvm 2.0.0 ; rvm gemset import system