Is "ruby script/plugin" a command?

Question

I was following an online tutorial to create an Ruby on Rails application on App Engine.

There is one command which other people can run, but it didn't run on my Ubuntu 10.10:

ruby script/plugin install http://svn.avdi.org/nulldb/trunk/

When I try to run it, it complains: ruby1.8: No such file or directory script/plugin (LoadError)

What is wrong with my computer?

ruby  -v  ==> 1.8.7
rails -v  ==> 2.3.10  
gem   -v  ==> 1.3.7

Answer 1

if using rails3, cd into your rails app root dir then use

rails plugin install http://url/of/your/package