Cli

kubectl is the primary interface to a Kubernetes cluster. This cheatheet covers routine operations — from context setup to pod debugging and namespace switching. All commands are verified against current kubectl versions (1.28+). Installation and …

Git Tag: Marking Releases and Bookmarks in History Tags are Git’s mechanism for assigning meaningful labels to specific commits. Unlike branches, tags don’t move — they’re pinned to a commit and serve as anchors for releases, versions, and critical …

pipx solves a simple but chronic problem: you need to run a Python utility once or occasionally, and pip install pollutes the global environment or leaves behind a virtual environment you forget to clean up. pipx creates an isolated venv for each …

When ifconfig returns nothing and configuring a route requires a separate command, that’s not a system bug. It’s iproute2 — the package that replaced net-tools in modern Linux distributions. The ip utility from iproute2 is the standard interface for …

Certificates expiring on prod at the worst moment — a familiar story. OpenSSL answers TLS certificate questions faster than any marketplace checker. Here are the key scenarios without the fluff. Basic Certificate Parsing The first command for any …

cURL is the standard tool for debugging HTTP in the terminal. It ships out of the box on Linux and macOS and is present in most Docker images. Need to quickly check an API, inspect response headers, or trace a redirect issue — one command line is …

When netstat hangs on a server with tens of thousands of connections, it’s time to switch to ss. Part of the iproute2 package, ss queries the kernel directly via netlink instead of parsing /proc/net/*. The result is instant output with minimal …