Venture into advanced SSH key management concepts such as SSH Certificate Authority (CA) and learn how to set up and manage it manually.

SSH keys are cryptographic keys that enable user authentication to servers, providing a secure alternative to traditional passwords. They not only increase security but also greatly simplify daily tasks for developers.

Delve deeper into the creation and management of SSH keys, learning about passphrase protection and the differences between public and private keys.

Explore the various methods for distributing and utilizing SSH keys, ensuring secure and seamless access to remote servers and GitHub.

With the constant rise of online threats, it becomes more crucial to ensure that your server is secure. Review these basic measures, and make your server safer. The steps in this guide are primarily geared towards Ubuntu and Debian, but the fundamental principles are the same.