SSH

Secure Shell

Encrypted remote shell and tunneling protocol.

When you'd see it: Server administration and deployment. SSH is how engineers securely log into remote machines.

Why it matters: SSH provides an encrypted channel to control a remote server and to tunnel other traffic. Its key-based authentication is more secure than passwords and a common source of access-management headaches.

Common mistakes: Sharing or never rotating SSH keys. A leaked key is a standing door into your servers, and unmanaged keys pile up into real risk.