http://weblog.rubyonrails.com/2008/6/1/rails-2-1-time-
zones-dirty-caching-gem-dependencies-caching-etc
En Linux
Para instalar Rails por primera vez, hacer:
sudo gem install rails
Para actualizar una instalación previa de Rails, hacer:
sudo gem update rails
En Windows
Para instalar Rails por primera vez, hacer:
gem install rails
Para actualizar una instalación previa de Rails, hacer:
gem update rails
Ejemplo
Ejemplo de sesión actualizando a Rails:
gem update rails
Updating installed gems...
Attempting remote update of rails
Install required dependency rake? [Yn] Y
Install required dependency activesupport? [Yn] Y
Install required dependency activerecord? [Yn] Y
Install required dependency actionpack? [Yn] Y
Install required dependency actionmailer? [Yn] Y
Install required dependency activeresource? [Yn] Y
Successfully installed rails-2.1.0
Successfully installed rake-0.8.1
Successfully installed activesupport-2.1.0
Successfully installed activerecord-2.1.0
Successfully installed actionpack-2.1.0
Successfully installed actionmailer-2.1.0
Successfully installed activeresource-2.1.0
Installing ri documentation for rake-0.8.1...
Installing ri documentation for activesupport-2.1.0...
Installing ri documentation for activerecord-2.1.0...
Installing ri documentation for actionpack-2.1.0...
Installing ri documentation for actionmailer-2.1.0...
Installing ri documentation for activeresource-2.1.0...
Installing RDoc documentation for rake-0.8.1...
Installing RDoc documentation for activesupport-2.1.0...
Installing RDoc documentation for activerecord-2.1.0...
Installing RDoc documentation for actionpack-2.1.0...
Installing RDoc documentation for actionmailer-2.1.0...
Installing RDoc documentation for activeresource-2.1.0...
Gems: [rails] updated
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