# Require command problem **URL:** \ **Category:** ruby-talk\ **Created:** [11 June 2010 11:04 UTC](https://rubytalk.org/t/require-command-problem/58856 "2010-06-11T11:04:46Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Pen\_Ttt](https://avatars.discourse-cdn.com/v4/letter/p/898d66/32.png) [@Pen\_Ttt](https://rubytalk.org/u/Pen_Ttt)\ **Post date:** [11 June 2010 11:04 UTC](https://rubytalk.org/t/require-command-problem/58856/1 "2010-06-11T11:04:46Z")
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 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? > **···** > > from :0 > -- > Posted via [http://www.ruby-forum.com/](http://www.ruby-forum.com/). ---
**Author:** ![Rein\_Henrichs](https://avatars.discourse-cdn.com/v4/letter/r/71c47a/32.png) [@Rein\_Henrichs](https://rubytalk.org/u/Rein_Henrichs)\ **Post date:** [11 June 2010 11:50 UTC](https://rubytalk.org/t/require-command-problem/58856/2 "2010-06-11T11:50:09Z")
Your filenames should not use uppercase letters. You should not move things into the rubygems directory manually. You should access them from within your library or from an installed gem. Look at any Ruby library to see correct directory structure, file names and use of require. > **···** > > On 2010-06-11 04:04:46 -0700, Pen Ttt said: > > > 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? > > -- > Rein Henrichs > > > **[Puppet Infrastructure & IT Automation at Scale | Puppet by Perforce](https://www.puppet.com/)** > > > > Puppet is the industry-leading automation solution for configuration management, compliance, CI/CD, patch management, IT automation, and more. > > [http://reinh.com](http://reinh.com) ---
**Author:** ![Brian\_Candler](https://avatars.discourse-cdn.com/v4/letter/b/5f9b8f/32.png) [@Brian\_Candler](https://rubytalk.org/u/Brian_Candler)\ **Post date:** [11 June 2010 16:18 UTC](https://rubytalk.org/t/require-command-problem/58856/3 "2010-06-11T16:18:37Z")
Pen Ttt wrote: > i have write a class ,use command to put in the > /usr/lib/ruby/1.8/rubygems/Webmovie.rb But /usr/local/lib/1.8/rubygems is not in the load path (i.e. ruby doesn't look for files there), so ruby won't find it. $ irb --simple-prompt > > $LOAD\_PATH =\> ["/usr/local/lib/site\_ruby/1.8", "/usr/local/lib/site\_ruby/1.8/x86\_64-linux", "/usr/local/lib/site\_ruby", "/usr/lib/ruby/vendor\_ruby/1.8", "/usr/lib/ruby/vendor\_ruby/1.8/x86\_64-linux", "/usr/lib/ruby/vendor\_ruby", "/usr/lib/ruby/1.8", "/usr/lib/ruby/1.8/x86\_64-linux", "."] On your system, /usr/local/lib/site\_ruby is probably the appropriate place to put ad-hoc libraries. Otherwise, your program can choose the location:   $LOAD\_PATH.unshift "/path/to/my/lib" rubygems itself does add things to $LOAD\_PATH, but they typically are of the form /usr/lib/ruby/gems/1.8/gems/\-\/lib. If you want your library to go here, then package it up as a gem, and install the gem. (For Ubuntu, with rubygems installed using apt-get, it'll be /var/lib/gems/1.8/...) > **···** > > -- > Posted via [http://www.ruby-forum.com/\](http://www.ruby-forum.com/%5C). ---
**Author:** ![Pen\_Ttt](https://avatars.discourse-cdn.com/v4/letter/p/898d66/32.png) [@Pen\_Ttt](https://rubytalk.org/u/Pen_Ttt)\ **Post date:** [12 June 2010 02:50 UTC](https://rubytalk.org/t/require-command-problem/58856/4 "2010-06-12T02:50:09Z")
1.hello.rb position: /home/pt/test/hello.rb content: class Hihi def self.hello   puts "HELLO" end end 2.hello.gemspec position: /home/pt/test/hello.gemspec content: Gem::Specification.new do |s|      [s.name](http://s.name) = 'hello'      s.version = '0.1.0'      s.summary = 'hello gems'      s.files = ["/home/pt/test/hello.rb"]      s.summary='output hello'      s.description='output hello' end 3.gem build pt@pt-laptop:~$gem build /home/pt/test/hello.gemspec WARNING: no author specified WARNING: no email specified WARNING: no homepage specified WARNING: no rubyforge\_project specified   Successfully built RubyGem   Name: hello   Version: 0.1.0   File: hello-0.1.0.gem pt@pt-laptop:~$ gem install hello WARNING: Installing to ~/.gem since /var/lib/gems/1.8 and     /var/lib/gems/1.8/bin aren't both writable. WARNING: You don't have /home/pt/.gem/ruby/1.8/bin in your PATH,     gem executables will not run. ERROR: Error installing hello:   attempt to install file into "/home/pt/test/hello.rb" pt@pt-laptop:~$ irb irb(main):001:0\> require 'hello' LoadError: no such file to load -- hello   from (irb):1:in `require'   from (irb):1 irb(main):002:0\> require '/home/pt/test/hello' =\> true irb(main):003:0\> Hihi.hello HELLO =\> nil irb(main):004:0\> problem: Would you be kind enough to solve this problem for me ? 1.why in my system /var/lib/gems/1.8 and /var/lib/gems/1.8/bin aren't both writable. how to make them writable? 2.how can i use require command this way: require 'hello' not require '/home/pt/test/hello'? > **···** > > from :0 > > -- > Posted via [http://www.ruby-forum.com/](http://www.ruby-forum.com/). ---
**Author:** ![Fleck\_Jean-Julien](https://avatars.discourse-cdn.com/v4/letter/f/65b543/32.png) [@Fleck\_Jean-Julien](https://rubytalk.org/u/Fleck_Jean-Julien)\ **Post date:** [12 June 2010 04:23 UTC](https://rubytalk.org/t/require-command-problem/58856/5 "2010-06-12T04:23:00Z")
Hello, > Would you be kind enough to solve this problem for me ? > 1.why in my system > /var/lib/gems/1.8 and /var/lib/gems/1.8/bin aren't both writable. > how to make them writable? You have to be root to write there: sudo gem install hello > 2.how can i use require command this way: require 'hello' not > require '/home/pt/test/hello'? You have to require rubygems first for your ruby to know where to look for gems: require 'rubygems' require 'hello' Cheers, > **···** > > -- > JJ Fleck > PCSI1 Lycée Kléber ---
**Author:** ![Brian\_Candler](https://avatars.discourse-cdn.com/v4/letter/b/5f9b8f/32.png) [@Brian\_Candler](https://rubytalk.org/u/Brian_Candler)\ **Post date:** [12 June 2010 06:46 UTC](https://rubytalk.org/t/require-command-problem/58856/6 "2010-06-12T06:46:55Z")
Pen Ttt wrote: >      s.files = ["/home/pt/test/hello.rb"] ... > ERROR: Error installing hello: >   attempt to install file into "/home/pt/test/hello.rb" Don't use absolute path specifications in your gemspec. I suggest you find a small gem, and copy what they do. That's what I did when I wrote my first gemspec: > (sorry, I can't remember which small gem I based this on 🙂 Regards, Brian. > **···** > > -- > Posted via [http://www.ruby-forum.com/\](http://www.ruby-forum.com/%5C).