shell

Bash is the default entry point for automating ops and deploys, and the details that make a script robust — default variables, parameter expansion and string slicing, conditionals, and loops — are where the skill lives. This reference covers variables, branches, loops, functions, and common string/file operations for both writing scripts from scratch and debugging existing ones.

A Zsh terminal-configuration reference covering common .zshrc settings, oh-my-zsh plugins and themes, aliases, autocompletion, history search, and prompt customization.

A Fish Shell reference covering its syntax differences from Bash, variables and functions, out-of-the-box autocompletion, aliases, and theme configuration.

On Windows, system administration and automation hinge on PowerShell's object pipeline — cmdlets return objects, not text, so you filter and act on properties directly. This reference covers common cmdlets and their Linux counterparts, file/process/service operations, and Invoke-Command remoting, to turn daily Windows ops into scripts.