宝石不能安装导轨

Question

这个问题之前已被多次询问,但似乎其他人都在OS X上尝试它.我在Ubuntu上.

这是我尝试时得到的结果sudo gem install rails:

$ sudo gem install rails
Successfully installed rails-3.0.3
1 gem installed
Installing ri documentation for rails-3.0.3...
file 'lib' not found
Installing RDoc documentation for rails-3.0.3...
file 'lib' not found

我需要做些什么才能让它发挥作用？

我知道它不起作用因为:

$ rails
The program 'rails' is currently not installed.  To run 'rails' please ask your administrator to install the package 'rails'

Answer 1

事实证明我需要这样做：

sudo apt-get install ruby-dev build-essential