Shell

What Is PowerShell?

An introduction to PowerShell as Microsoft's object-oriented shell and scripting language, covering what sets it apart from traditional command-line tools.

Shell Navigation

Learn how .NET MAUI Shell provides a unified, URI-based navigation system with flyouts, tabs, and route registration.

sed in Shell Pipelines

How to wire sed into Unix pipelines as a stream filter, combining it with cat, grep, sort, and xargs to build powerful one-liner text-processing workflows.

AWK in Shell Pipelines

How to slot AWK into Unix pipelines as a field-aware filter and transformer, passing data between grep, sort, cut, and other tools via stdin and stdout.

Writing Portable Shell Scripts

How to write shell scripts that behave consistently across bash versions, macOS vs Linux, and POSIX sh, avoiding the common traps that break scripts on a diffe…

The Mongo Shell and mongosh

How to use mongosh, MongoDB's modern JavaScript-based shell, for interactive queries, scripting, and administration.

Common Shell Scripting Pitfalls

A field guide to the mistakes that silently break Bash scripts — unquoted variables, wrong test operators, subshell scoping, and error-handling gaps.

Environment Variables and PATH

Understand how environment variables are set, exported, and inherited by child processes, and how PATH determines which executable a bare command name resolves…

Linux & Shell Scripting Interview Questions

A curated set of frequently asked Linux and Bash interview questions with model answers, spanning fundamentals, scripting, and troubleshooting scenarios.

Linux & Shell Quick Reference

A condensed cheat sheet consolidating the most frequently used Linux commands, Bash syntax, and shortcuts covered throughout this course for fast lookup.

The Shell and Terminal Explained

Clarifies the difference between the terminal, the terminal emulator, the shell, and the kernel, and introduces Bash as the default command interpreter on most…