This course contains lots of challenges for Docker, each challenge is a small Docker project with detailed instructions and solutions. You can practice your Docker skills by solving these challenges, improve your problem-solving skills, and learn how to write clean and efficient code.

Per-build credential bootstrap for Packer/Kickstart: generates a passphrase-protected SSH keypair and temporary build-user password (hashed for Kickstart), injects the public key + hash via Packer vars, and loads the private key into ssh-agent for Packer/Ansible.