rabbitmqctl add_user admin admin rabbitmqctl set_user_tags admin administrator rabbitmqctl set_permissions -p / admin ".*" ".*" ".*"
curl -i -u admin:admin http://localhost:15672/api/whoami
First, list your queues:
rabbitmqadmin list queues name
Then from the list, you'll need to manually delete them one by one:
rabbitmqadmin delete queue name='queuename'
Because of the output format, doesn't appear you can grep the response from list queues. Alternatively, if you're just looking for a way to clear everything (read: reset all settings, returning the installation to a default state), use:
rabbitmqctl stop_app rabbitmqctl reset # Be sure you really want to do this! rabbitmqctl start_app