Fix Rake Error: You Have Already Activated Rake x.x.x
I encountered the following error when I try to create a new post in Octopress:
You have already activated rake 10.0.4, but your Gemfile requires rake 0.9.2.2. Using bundle exec may solve this.
This happened because I updated rake.
To solve, simple open
Gemfile, and update the version number to the latest activated version on your system. eg.
gem 'rake', '~> 10.0.4'