knife cookbook bulk delete example

vagrant@chefws:~/chef-repo/cookbooks$ knife cookbook bulk delete "^ch*|^win*"
All versions of the following cookbooks will be deleted:

chef_handler  windows    

Do you really want to delete these cookbooks? (Y/N)Y

Deleted cookbook  chef_handler              [1.1.6]
Deleted cookbook  windows                   [1.33.1]