On DevOps

We all love to automate things, right? So, you remember that lonely pet project of yours that you've been working on for a while now? It's too small for a proper solution like k8s to seem reasonable, but you still want to deploy it somewhere and have it running.

A practical guide to application configuration: keep deploy-specific values out of code, parse and validate configuration at startup, make precedence explicit, and treat secrets as secrets.

PHP CLI can read environment variables directly, but PHP-FPM intentionally clears worker environments by default. Here is how to pass only the variables your application actually needs.

Linux can report “No space left on device” even when df -h shows plenty of free disk space. One common cause is inode exhaustion: the filesystem can still store bytes, but it cannot create more files.

A compact, current recipe for adding a swap file on Ubuntu: create the file, protect permissions, enable it, persist it in fstab, verify it, and know how to roll it back.

A short practical guide to ~/.ssh/config: create readable SSH aliases, pin the right user, port, and key, verify the final config, and avoid common agent-forwarding mistakes.