AWK: The Small Language That Quietly Became a Data Engine

There is a moment every engineer hits. You're staring at a text file-logs, CSVs, metrics, something messy-and you think: "I just need…

Sed, a powerfull mini-language from the 70s

There's a moment when using sed stops feeling like typing weird incantations… and starts feeling like you're programming a living stream of…

Logrotate for Nginx: Understanding missingok, notifempty, sharedscripts, prerotate, postrotate (and switching to size-based rotation)

If you run Nginx in production, your access and error logs can grow fast. On most Linux systems, log rotation is handled…