Hi all.

Humble Bundle has on sale a book bundle of what it calls "Linux for Seasoned Admins", which includes titles for a number of common open source tech including Docker, Ansible, Kubernetes, and one called "Efficient Linux at the Command Line".

The full bundle of 15 titles is available for CAD $34.18 or as few as $1.38 for five of them.

Looks like it expires at the end of the month.