问题描述
有谁知道如何在Ubuntu上更新RubyGems。通常的方法不起作用：
steve@ubuntu:~$ rails /home/steve/www/mynewapp -d mysql
create
create app/controllers
create app/helpers
create app/models
create app/views/layouts
create config/environments
create config/initializers
create config/locales
create db
create doc
create lib
create lib/tasks
create log
create public/images
create public/javascripts
create public/stylesheets
create script/performance
create test/fixtures
create test/functional
create test/integration
create test/performance
create test/unit
create vendor
create vendor/plugins
create tmp/sessions
create tmp/sockets
create tmp/cache
create tmp/pids
create Rakefile
create README
create app/controllers/application_controller.rb
create app/helpers/application_helper.rb
create config/database.yml
create config/routes.rb
create config/locales/en.yml
create db/seeds.rb
create config/initializers/backtrace_silencers.rb
create config/initializers/inflections.rb
create config/initializers/mime_types.rb
create config/initializers/new_rails_defaults.rb
create config/initializers/session_store.rb
create config/environment.rb
create config/boot.rb
create config/environments/production.rb
create config/environments/development.rb
create config/environments/test.rb
create script/about
create script/console
create script/dbconsole
create script/destroy
create script/generate
create script/runner
create script/server
create script/plugin
create script/performance/benchmarker
create script/performance/profiler
create test/test_helper.rb
create test/performance/browsing_test.rb
create public/404.html
create public/422.html
create public/500.html
create public/index.html
create public/favicon.ico
create public/robots.txt
create public/images/rails.png
create public/javascripts/prototype.js
create public/javascripts/effects.js
create public/javascripts/dragdrop.js
create public/javascripts/controls.js
create public/javascripts/application.js
create doc/README_FOR_APP
create log/server.log
create log/production.log
create log/development.log
create log/test.log
steve@ubuntu:~$ cd /home/steve/www/mynewapp
steve@ubuntu:~/www/mynewapp$ ruby script/server
Rails requires RubyGems >= 1.3.2 (you have 1.3.1). Please `gem update --system` and try again.
steve@ubuntu:~/www/mynewapp$ gem update --system
ERROR: While executing gem ... (RuntimeError)
gem update --system is disabled on Debian. RubyGems can be updated using the official Debian repositories by aptitude or apt-get.
最佳解决方法
好像你从Debian /apt-get软件包中安装了rubygems。
如果您使用的是Ubuntu 9.04或更高版本，则可能会有效：
sudo gem install rubygems-update
sudo update_rubygems
否则，删除软件包并从源代码安装rubygems，这是安装rubygems的推荐方法：
sudo apt-get remove rubygems
wget http://rubyforge.org/frs/download.php/60718/rubygems-1.3.5.tgz
tar xzvf rubygems-1.3.5.tgz
cd rubygems-1.3.5
sudo ruby setup.rb
sudo ln -s /usr/bin/gem1.8 /usr/bin/gem
sudo gem update --system
更多资源：Ruby on Rails installation on Ubuntu。