Deep dives into DevOps and server-side topics, combining theory with hands-on examples. Run every command in an attached remote playground, from your browser or local terminal over SSH — no setup required.
SSH port forwarding explained in a clean and visual way. How to use local and remote port forwarding. What sshd settings may need to be adjusted. How to memorize the right flags.
Put OpenClaw, a self-hosted AI assistant with shell and file access, behind a web route and an SSH route, both gated by the same identity and Pomerium's context-aware policy. OpenClaw runs in trusted-proxy mode, trusting signed identity headers instead of its own login, while Pomerium's native SSH proxy signs short-lived certificates for shell access.
Learn how you can control multiple podman instances on remote machines without SSHing into them manually. Also learn to deploy your Compose application stacks without SCP / SSH with podman remote feature and Docker Compose v2
Take a stock Debian SSH server and harden it the way you would in production: replace passwords with public-key auth, disable root login, add a TOTP second factor with PAM, and move off port 22, then prove it works by logging in, all inside the playground.
