when I run the first command you gave me appears the help of the rails, and apparently does not install, and the second an error.
I put down the errors and the versions of ruby and rails.
rodrigo@rrmartins:~/Documentos/vota_prato2$ sudo ruby script/rails plugin install git://github.com/rails/rails_upgrade.git
ruby: No such file or directory – script/rails (LoadError)
rodrigo@rrmartins:~/Documentos/vota_prato2$ sudo rails plugin install git://github.com/rails/rails_upgrade.git
rails new APP_PATH [options]
-r, [–ruby=PATH] # Path to the Ruby binary of your choice
# Default: /usr/local/bin/ruby
-d, [–database=DATABASE] # Preconfigure for selected database (options: mysql/oracle/postgresql/sqlite3/frontbase/ibm_db)
# Default: sqlite3
-b, [–builder=BUILDER] # Path to an application builder (can be a filesystem path or URL)
-m, [–template=TEMPLATE] # Path to an application template (can be a filesystem path or URL)
[--dev] # Setup the application with Gemfile pointing to your Rails checkout
[--edge] # Setup the application with Gemfile pointing to Rails repository
[--skip-gemfile] # Don't create a Gemfile
-O, [–skip-active-record] # Skip Active Record files
-T, [–skip-test-unit] # Skip Test::Unit files
-J, [–skip-prototype] # Skip Prototype files
-G, [–skip-git] # Skip Git ignores and keeps
-f, [–force] # Overwrite files that already exist
-p, [–pretend] # Run but do not make any changes
-q, [–quiet] # Supress status output
-s, [–skip] # Skip files that already exist
-v, [–version] # Show Rails version number and quit
-h, [–help] # Show this help message and quit
The ‘rails new’ command creates a new Rails application with a default
directory structure and configuration at the path you specify.
rails new ~/Code/Ruby/weblog
This generates a skeletal Rails installation in ~/Code/Ruby/weblog.
See the README in the newly created application to get going.
rodrigo@rrmartins:~/Documentos/vota_prato2$ rails -v
rodrigo@rrmartins:~/Documentos/vota_prato2$ ruby -v
ruby 1.9.2p290 (2011-07-09 revision 32553) [i686-linux]