On the page
www.www.concrete5.org/documentation/introduction/dashboard/...
I think there is a minor error at the end. It says
<<
Since most (likely all) Dashboard pages will need to utilize at least some bit of logic, it’s best to place that code in a controller file. The controller for your custom dashboard page should be located in its own proper override directory:

your_site_root/dashboard/controllers/dashboard/awesome>>
>>
but I think the last line should be
your_site_root/controllers/dashboard/awesome