The Many Facets of RubyGems
The gem Command
traken$ gem help command

GEM commands are:

    build             Build a gem from a gemspec
    check             Check installed gems
    environment       Display RubyGems environmental information
    help              Provide help on the 'gem' command
    install           Install a gem into the local repository
    list              Display all gems whose name starts with STRING
    query             Query gem information in local or remote repositories
    rdoc              Generates RDoc for pre-installed gems
    search            Display all gems whose name contains STRING
    specification     Display gem specification (in yaml)
    uninstall         Uninstall a gem from the local repository
    unpack            Unpack an installed gem to the current directory
    update            Upgrade all currently installed gems in the local repository