I had downloaded ruby, rails, and rubygems previously on my hard drive when I ran Windows. I just downloaded Ubuntu and tried to use RoR but it wasn't working, so I figured I had to follow the installation procedure listed here Getting Started with Rails — Ruby on Rails Guides to get it working. When I type in
sudo gem install rails
I get the following error message
/usr/local/lib/site_ruby/1.9.1/rubygems/package.rb:383:in
`alias_method': undefined method `is_file' for class
`Gem:
:TarReader::Entry' (NameError)
from /usr/local/lib/site_ruby/1.9.1/rubygems/package.rb:383:in
`<class:Entry>'
from /usr/local/lib/site_ruby/1.9.1/rubygems/package.rb:319:in
`<class:TarReader>'
from /usr/local/lib/site_ruby/1.9.1/rubygems/package.rb:311:in
`<module:Package>'
from /usr/local/lib/site_ruby/1.9.1/rubygems/package.rb:46:in
`<module:Gem>'
from /usr/local/lib/site_ruby/1.9.1/rubygems/package.rb:18:in `<top
(required)>'
from /usr/local/lib/site_ruby/1.9.1/rubygems/custom_require.rb:21:in
`require'
from /usr/local/lib/site_ruby/1.9.1/rubygems/custom_require.rb:21:in
`require'
from /usr/local/lib/site_ruby/1.9.1/rubygems/builder.rb:1:in `<top
(required)>'
from /usr/local/lib/site_ruby/1.9.1/rubygems/custom_require.rb:21:in
`require'
from /usr/local/lib/site_ruby/1.9.1/rubygems/custom_require.rb:21:in
`require'
from /usr/local/lib/site_ruby/1.9.1/rubygems.rb:61:in `manage_gems'
from /usr/bin/gem:4:in `<main>'
I have no idea how to solve this. At this point I just want to delete everything having to do with rails and ruby and start over again. How do I do this?