Usage:
 
    rvm [--debug][--trace][--nice] <command> <options>

  for example:

    rvm list                # list installed interpreters 
    rvm list known          # list available interpreters
    rvm install <version>   # install ruby interpreter
    rvm use <version>       # switch to specified ruby interpreter
    rvm remove <version>    # remove ruby interpreter (alias: delete)
    rvm get <version>       # upgrade rvm: stable, master

Available commands:

  rvm has a number of common commands, listed below. Additional information about any command
  can be found by executing `rvm help <command>`. 

  ruby installation
      fetch                   # download binary or sources for selected ruby version
      install                 # install ruby interpreter
      list                    # show currently installed ruby interpreters
      list known              # list available interpreters
      mount                   # install ruby from external locations
      patchset                # tools related to managing ruby patchsets
      pkg                     # install a dependency package
      reinstall               # reinstall ruby and run gem pristine on all gems
      remove                  # remove ruby and downloaded sources (alias: delete)
      requirements            # installs dependencies for building ruby
      uninstall               # uninstall ruby, keeping it's sources
      upgrade                 # upgrade to another ruby version, migrating gems

  running different ruby versions
      current                 # print current ruby version and name of used gemsets
      do                      # runs a command against specified and/or all rubies
      gemdir                  # display path to current gem directory ($GEM_HOME)
      use <version>           # switch to given (and already installed) ruby version
      use default             # switch to default ruby, or system if none is set
      use system              # switch to system ruby
      wrapper                 # creates wrapper executables for a given ruby & gemset

  managing gemsets
      gemset                  # manage gemsets 
      migrate                 # migrate all gemsets from one ruby to another

  rvm configuration
      alias                   # define aliases for `rvm use`
      autolibs                # tweak settings for installing dependencies automatically 
      group                   # tools for managing groups in multiuser installations
      rvmrc                   # tools related to managing .rvmrc trust & loading gemsets

  rvm maintenance
      implode                 # removes the rvm installation completely
      cleanup                 # remove stale source files & data associated with rvm
      cron                    # manage setup for using ruby in cron
      docs                    # tools to make installing ri and rdoc docs easier
      get                     # upgrades RVM to latest head, stable or branched version
      osx-ssl-certs           # helps update OpenSSL certs installed by rvm on OS X
      reload                  # reload rvm source itself
      reset                   # remove all default and system settings
      snapshot                # backup/restore rvm installation

  troubleshooting
      config-get              # display values for RbConfig::CONFIG variables
      debug                   # additional information helping to discover issues
      export                  # set temporary env variable in the current shell
      fix-permissions         # repairs broken permissions
      repair                  # lets you repair parts of your environment, such as
                              # wrappers, env files and similar (general maintenance)
      rubygems                # switches version of rubygems for the current ruby
      tools                   # general information about the ruby env
      unexport                # undo changes made to the environment by `rvm export`
      user                    # tools for managing RVM mixed mode in multiuser installs

   information and documentation
      info                    # show the environment information for current ruby
      disk-usage              # display disk space occupied by rvm
      notes                   # display notes with operating system specifics
      version                 # display rvm version (equal to `rvm -v`)

   additional global options
      --debug                 # toggle debug mode on for very verbose output
      --trace                 # toggle trace mode on to see EVERYTHING rvm is doing
      --nice                  # process niceness (increase the value on slow computers, default 0)