This is to setup a developement environment for Ruby 1.87 and Rails 2.2.3 on Ubuntu 10.04 (Lucid).
[sourcecode language="bash"]
# make sure ubuntu is up to date
$ sudo apt-get update
$ sudo apt-get dist-upgrade
# install ruby
$ sudo apt-get install ruby1.8-dev ruby1.8 ri1.8 rdoc1.8 irb1.8 libreadline-ruby1.8 libruby1.8 libopenssl-ruby rubygems1.8
# install sqlite3
$ sudo apt-get install sqlite3 libsqlite3-ruby1.8 libsqlite3-dev
# install rails
$ sudo gem install rails -v 2.2.3 --no-ri --no-rdoc
$ sudo gem install ruby-debug-base ruby-debug-ide
[/sourcecode]