安装puppet时报错“no such file to load -- secu?报错

在执行puppet的时候，出现下面的问题，大家遇到过吗？

系统环境：

OS：Red Hat Enterprise Linux Server release 5.8 (Tikanga)     x86_64

ruby版本：ruby 1.8.5 (2006-08-25) [x86_64-linux]

安装的是 puppet-3.7.4.tar.gz

现象如下：

# puppet
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require': no such file to load -- securerandom (LoadError)
        from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
        from /usr/lib/ruby/site_ruby/1.8/puppet/util.rb:12
        from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
        from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
        from /usr/lib/ruby/site_ruby/1.8/puppet.rb:8
        from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
        from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
        from /usr/lib/ruby/site_ruby/1.8/puppet/util/command_line.rb:12
        from /usr/bin/puppet:7:in `require'
        from /usr/bin/puppet:7

我打开util.rb文件，找到报错的第12行，需要加载一个叫securerandom的模块，但我不知道这个依赖的模块怎么找到？朋友们有遇到过的吗？给个建议

# vi /usr/lib/ruby/site_ruby/1.8/puppet/util.rb

     12 require 'securerandom'