# Rails install problem? **URL:** \ **Category:** Ruby\ **Created:** [November 7, 2006, 10:50am UTC](https://www.ruby-forum.com/t/rails-install-problem/74620 "2006-11-07T10:50:20Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Robert\_Heller](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/858c86/32.png) [@Robert\_Heller](https://www.ruby-forum.com/u/Robert_Heller)\ **Post date:** [November 7, 2006, 10:50am UTC](https://www.ruby-forum.com/t/rails-install-problem/74620/1 "2006-11-07T10:50:20Z")
I just installed ruby on my CentOS 4.4 system, using yum: [sauron.deepsoft.com](http://sauron.deepsoft.com)% rpm -qa | grep ruby ruby-devel-1.8.1-7.EL4.6 ruby-mode-1.8.1-7.EL4.6 ruby-libs-1.8.1-7.EL4.6 ruby-tcltk-1.8.1-7.EL4.6 ruby-docs-1.8.1-7.EL4.6 ruby-1.8.1-7.EL4.6 I then install RubyGems 0.9.0, which went OK (no error messages). I then used gem to install rails and got this: [auron.deepsoft.com](http://auron.deepsoft.com)% sudo gem install rails --include-dependencies Bulk updating Gem source index for: [http://gems.rubyforge.org](http://gems.rubyforge.org) Successfully installed rails-1.1.6 Successfully installed rake-0.7.1 Successfully installed activesupport-1.3.1 Successfully installed activerecord-1.14.4 Successfully installed actionpack-1.12.5 Successfully installed actionmailer-1.2.5 Successfully installed actionwebservice-1.1.6 /usr/lib/site\_ruby/1.8/rubygems/custom\_require.rb:35:in `require': No such file to load -- irb/slex (LoadError) from /usr/lib/site_ruby/1.8/rubygems/doc_manager.rb:71:in `load\_rdoc’ from /usr/lib/site\_ruby/1.8/rubygems/doc\_manager.rb:41:in `generate_ri' from /usr/lib/site_ruby/1.8/rubygems/gem_commands.rb:283:in `execute’ from /usr/lib/site\_ruby/1.8/rubygems/gem\_commands.rb:282:in `each' from /usr/lib/site_ruby/1.8/rubygems/gem_commands.rb:282:in `execute’ from /usr/lib/site\_ruby/1.8/rubygems/gem\_commands.rb:220:in `each' from /usr/lib/site_ruby/1.8/rubygems/gem_commands.rb:220:in `execute’ from /usr/lib/site\_ruby/1.8/rubygems/command.rb:69:in `invoke' from /usr/lib/site_ruby/1.8/rubygems/cmd_manager.rb:117:in `process\_args’ from /usr/lib/site\_ruby/1.8/rubygems/cmd\_manager.rb:88:in `run' from /usr/lib/site_ruby/1.8/rubygems/gem_runner.rb:29:in `run’ from /usr/bin/gem:23 Is this a problem? If so, what is the cure? ---
**Author:** ![Robert\_Heller](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/858c86/32.png) [@Robert\_Heller](https://www.ruby-forum.com/u/Robert_Heller)\ **Post date:** [November 7, 2006, 10:50am UTC](https://www.ruby-forum.com/t/rails-install-problem/74620/2 "2006-11-07T10:50:27Z")
Robert Heller wrote: > I then install RubyGems 0.9.0, which went OK (no error messages). > > I then used gem to install rails and got this: I hit this too. The ri/rdoc are separate rpms for CentOS. Use yum to install rdoc. -Nate ---
**Author:** ![Robert\_Heller](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/858c86/32.png) [@Robert\_Heller](https://www.ruby-forum.com/u/Robert_Heller)\ **Post date:** [November 7, 2006, 10:50am UTC](https://www.ruby-forum.com/t/rails-install-problem/74620/3 "2006-11-07T10:50:30Z")
ran into the same problem with ubuntu… had to do aptitude install ri rdoc irb to get all those bits Tim Be who you are and say what you feel, because those who mind don’t matter and those who matter don’t mind. - Dr. Seuss ---
**Author:** ![Robert\_Heller](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/858c86/32.png) [@Robert\_Heller](https://www.ruby-forum.com/u/Robert_Heller)\ **Post date:** [November 7, 2006, 10:50am UTC](https://www.ruby-forum.com/t/rails-install-problem/74620/4 "2006-11-07T10:50:40Z")
At Wed, 1 Nov 2006 08:53:04 +0900 Nate W. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > ruby-1.8.1-7.EL4.6 > > > > I then install RubyGems 0.9.0, which went OK (no error messages). > > > > I then used gem to install rails and got this: > > I hit this too. The ri/rdoc are separate rpms for CentOS. Use yum to > install rdoc. OK, I installed irb (I could not find any RPMs relating to ‘rdoc’). Now it does this: [sharky.deepsoft.com](http://sharky.deepsoft.com)% sudo gem install rails --include-dependencies Bulk updating Gem source index for: [http://gems.rubyforge.org](http://gems.rubyforge.org) Successfully installed rails-1.1.6 Successfully installed rake-0.7.1 Successfully installed activesupport-1.3.1 Successfully installed activerecord-1.14.4 Successfully installed actionpack-1.12.5 Successfully installed actionmailer-1.2.5 Successfully installed actionwebservice-1.1.6 Installing ri documentation for rake-0.7.1… lib/rake.rb:905:18: unexpected token: ‘#\’ Installing ri documentation for activesupport-1.3.1… Installing ri documentation for activerecord-1.14.4… Installing ri documentation for actionpack-1.12.5… lib/action\_controller/code\_generation.rb:77:31: unexpected token: ‘#\’ lib/action\_controller/code\_generation.rb:168:31: unexpected token: ‘#\’ Installing ri documentation for actionmailer-1.2.5… Installing ri documentation for actionwebservice-1.1.6… Installing RDoc documentation for rake-0.7.1… lib/rake.rb:905:18: unexpected token: ‘#\’ Installing RDoc documentation for activesupport-1.3.1… Installing RDoc documentation for activerecord-1.14.4… ERROR: While executing gem … (NoMethodError) undefined method `find\_module\_named’ for nil:NilClass