$ sudo gem update Updating installed gems Updating actionmailer ERROR: Error installing actionmailer: i18n requires RubyGems version >= 1.3.6 $ sudo gem update --system Updating RubyGems Updating rubygems-update Successfully installed rubygems-update-1.3.7 Updating RubyGems to 1.3.7 Installing RubyGems 1.3.7 RubyGems 1.3.7 installed $ sudo gem update
RubyGemsのアップデート
