Learn how one can use nftables for implementing firewall rules, whilst using Docker. However, this will require Docker to run in host networking mode.
A quick guide to enabling username/password based authentication in Vault.
Learn how to allow specific users to authenticate using a password, whilst everyone else has to authenticate via a key file instead.
This tutorial will show you how you can configure Docker to safely use a remote Docker host, by simply configuring SSH details, rather than having to set up any kind of fancy TLS security.
Create a GitHub deploy key in order to give your pipelines restricted access to just one project.
Learn how to store secrets / credentials in Jenkins.
Get started with using time-based one-time-passwords (TOTP) in PHP for MFA/2FA.
See just how easy it is to create keys for your services that have limited access rights. This could save your bacon.