Migrations rarely fail loudly. The site stays up while mail, cron, certificate renewal and the write path break silently behind it. A post-migration checklist for the first 48 hours, ordered by how long each failure can hide rather than by subsystem.
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.
Benchmarks pick the wrong winner. Here is how Nginx, Apache and Caddy actually differ in production: how each one fails under load, who owns certificate renewal, and where configuration lives when a developer needs to change it. Includes a decision procedure and the mistakes I see most.
Hand-built client servers fail quietly: you only find out they were never reproducible on the day you need to rebuild one. Here is how to automate server provisioning for new clients using cloud-init for first boot, Ansible for convergence, per-client secrets and a verification gate that refuses to hand over a half-built box.
Docker's default logging driver writes container output to a JSON file with no size limit and no rotation. This is a practical guide to Docker log rotation: what the defaults actually do, why your daemon.json change did nothing, why deleting the log file did not free any disk, and how to choose between json-file, local, journald and shipping logs off the box.
The dashboard is fine for editing a post. It is a terrible tool for anything touching a thousand rows, twelve plugins or two servers. Here are the WP-CLI commands that save hours on migrations, plugin conflicts, stalled cron and integrity checks, grouped by the job that eats the time, with the failure modes each one hides.
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.
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.
Your browser shows a padlock and your partner's API client throws "unable to get local issuer certificate". Both are correct. A practical guide to the four things a TLS client actually checks, and to renewal automation that reaches the running server instead of just the disk.
Loki was fast until someone added one more label. Now queries time out during incidents and the index no longer fits in memory. Here's the model you have to internalise, what replaced Promtail, and how to keep labels, retention and storage costs under control.