Sysadmin

A practical Unix user accounts guide with history, concepts, and a task-based cheatsheet covering inspection, creation, modification, groups, sudo, and troubleshooting.

A step-by-step guide to packaging a Python script into a Docker container — from Dockerfile to image to container, with tips, pitfalls, and best practices.

A task-based Docker cheatsheet with clear explanations, examples, and doc links — a grimoire for mastering containers.

A collection of lightweight shell and Python scripts that give your machines the power of a printer test page—consistent, friendly reports on disks, memory, networking, git repos, and more.

Run iperf3 tests across machines with ease—iperfer.sh starts the remote server, runs the client, and cleans up automatically.

A suite of powerful CLI scripts to analyze files, processes, packages, and your LAN—right from your shell.

These are some of the ps aliases and functions I have found useful over the years. Aliases I’ve always loved aliases. They make long and unmemorable commands memorable and they’re a pretty good, self-documenting way to keep track of those Hero commands that do something great but that you would struggle to remember. Here are a few that I developed working with Cloudera java processes and complex web server setups. ...