Rake Gems Install Error

I am getting the following error when try开发者_StackOverflow中文版ing to install gems:

Mohammad-Azams-MacBook-Pro:awesomecats azamsharp$ sudo rake gems:install
Password:
(in /Projects/awesomecats)
rake aborted!
Don't know how to build task 'gems:install'

(See full trace by running task with --trace)
Mohammad-Azams-MacBook-Pro:awesomecats azamsharp$ 

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If the task isn't listed in the output of rake -T then it isn't defined and you can't run it.

Rails 3 removed this task in favor of using Gemfile and bundler as the official gem installation procedure as gems:install was often tricky to get working properly.