Rails install fails on Ubuntu 10.10

I'm trying to install rails on Ubuntu 10.10, but get File not found: lib every time. Ruby and Rubygems have been installed correctly. I've seen this problem posted all over the web but no solutions work for me. I reinstalled rdoc and I still get the same result.

$ sudo gem install rails
...
S开发者_如何学Pythonuccessfully installed rails-3.0.1
24 gems installed
... 
Installing ri documentation for builder-2.1.2...
ERROR:  While generating documentation for builder-2.1.2
... MESSAGE:   Unhandled special: Special: type=17, text="<!-- HI -->"
... RDOC args: --ri --op /var/lib/gems/1.8/doc/builder-2.1.2/ri --title Builder -- Easy XML Building --main README --line-numbers --quiet lib CHANGES Rakefile README doc/releases/builder-1.2.4.rdoc doc/releases/builder-2.0.0.rdoc doc/releases/builder-2.1.1.rdoc --title builder-2.1.2 Documentation
(continuing with the rest of the installation)
...
Installing ri documentation for rails-3.0.1...
File not found: lib

$ rails -v
The program 'rails' is currently not installed.  You can install it by typing:
sudo apt-get install rails

I wrote a detailed how-to guide on installing Ruby and Rails on Ubuntu 10.10 that will help you with this.

Guaranteed, or your money back!

You should avoid the packaged version of Ruby (i.e., avoid the version of Ruby that comes from apt-get install ruby). The Debian packaging system (which Ubuntu uses) conflicts with what Ruby expects.

Instead, you should install Ruby from source.

There's a nice tool called RVM to help you do this.

# Install prerequisites
$ sudo apt-get install git curl wget

# Download and install RVM
$ bash < <( curl http://rvm.beginrescueend.com/releases/rvm-install-latest )

# Install RVM into your .bash_profile
$ cat >> ~/.bash_profile <<-PROFILE
> [[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm"
> PROFILE

# Load RVM into the current shell
$ rvm reload

# Install prerequisites
$ rvm notes
$ sudo apt-get install \
>   build-essential bison openssl libreadline6 libreadline6-dev curl \
>   git-core zlib1g zlib1g-dev libssl-dev libyaml-dev libsqlite3-0 \
>   libsqlite3-dev sqlite3 libxml2-dev libxslt-dev autoconf libc6-dev \
>   ncurses-dev

# Install Ruby
$ rvm install ruby-1.9.2-p180 # latest version as of now
$ rvm use ruby-1.9.2-p180 --default

# Check it
$ ruby -v
$ which ruby
$ gem install rails