小编Igo*_*eev的帖子

我在Ubuntu10上

sudo apt-get install ruby1.9.1-full

然后下载rubygem 1.3.7的源代码并安装它

sudo ruby setup.rb

然后,例如,安装sinatra

sudo gem install sinatra

最后打开irb并输入

require "rubygems"
require "sinatra"

并得到错误

LoadError: no such file to load -- sinatra
    from (irb):2:in `require'
    from (irb):2
    from /usr/bin/irb:12:in `<main>'