i have write a class ,use command to put in the /usr/lib/ruby/1.8/rubygems/Webmovie.rb sudo cp /tmp/Webmovie.rb /usr/lib/ruby/1.8/rubygems/Webmovie.rb Code.rb is my calss ,also in /usr/lib/ruby/1.8/rubygems/ pt@pt-laptop:~$ irb irb(main):001:0> require 'Code' => true irb(main):002:0> require 'Webmovie' LoadError: no such file to load -- Webmovie from (irb):2:in `require' from (irb):2 from :0 irb(main):003:0> require '/usr/lib/ruby/1.8/rubygems/Webmovie' => true irb(main):004:0> how can i use command require 'Webmovie' to get the class work? -- Posted via http://www.ruby-forum.com/.