Ckeditor and ckfinder
drush dl ckeditor
drush en -y ckeditor
drush ckeditor-download
drush cc all
drush dl imce
drush en imce
drush cc all
configuration - ckeditor - edit full HTML - file browser settings - set all 3 to imce
The following module makes it easy to make internal links using CKEditor
https://www.drupal.org/project/ckeditor_link
-- Old way --
Install the drupal module:
https://drupal.org/project/ckeditor
You will need to download and install the editor:
and the ckfinder
http://cksource.com/ckfinder/download
The installation instructions are:
https://drupal.org/node/728210
This will only work in the Full HTML edit