A single Ansible run can take a blank VPS to a hardened, reproducible server. The hard part is not the tasks, it is the order. Here is the ordering that keeps you logged in, the failures that pass green and bite two weeks later, and how to make the second run as safe as the first.
On a stock Linux server, journald and rsyslog are both running and both storing the same events, with retention policies that don't know about each other. Here's where each log line actually lives, the three failure modes that bite in production, and how to decide which copy you keep.
Podman is the better-designed container engine and Docker is the better-supported one. A working engineer's comparison: the architectural difference that drives everything, where each one wins and loses, the four things that genuinely break in a migration (compose, the Docker socket, privileged ports, restart on boot), and a decision procedure to run against your own setup.
You set PasswordAuthentication no, restarted SSH, and moved on. Months later the logs show successful password logins, because a vendor drop-in file sorted earlier and won. A VPS setup and hardening checklist where every step comes with the command that proves it worked.
The top search result tells you to run docker system prune -a --volumes. It frees the space and deletes your database. Here is how to measure Docker disk usage properly, reclaim it from safest to most destructive, and fix the logs that Docker never reports on.
Two static binaries, a package and four systemd units. How to install Prometheus and Grafana on a single server from scratch, wire in node_exporter, put nginx and TLS in front, and keep the ports that have no authentication off the public internet.
Almost every TLS certificate error traces back to one of three causes: a broken chain, a hostname the certificate does not cover, or an expiry nobody was watching. Here is how to tell them apart in under a minute, and how to stop the third one from ever happening again.
Most "the site is down" tickets are really DNS problems wearing a costume. Here's the practical DNS troubleshooting workflow I use — how to read dig output, follow the delegation chain, decode SERVFAIL and NXDOMAIN, and stop blaming propagation for things that are actually caching, TTL, or DNSSEC failures.
Docker containers rarely fail without leaving clues. This practical guide explores common Docker issues involving networking, storage, permissions, ports, logs, health checks, reverse proxies, and resource usage—and explains how to troubleshoot them methodically.