Operating systems tools

Command Substitution in Bash

This guide and cheat sheet will help your understand command substitution in Bash (and other shells). Be it in the command line or in a script, with command substitution you’ll be able to combine commands and their outputs in a very powerful way.

Debugging and Troubleshooting Your Bash Scripts

This guide and cheat sheet, explores various techniques and tools for troubleshooting and debugging your Bash scripts. We’ll cover both built-in approaches (like set options and trap) and external resources (shellcheck, logs) to help you quickly identify and fix issues.

Advanced Bash Scripting Guide, Cheat Sheet and Use Cases

This Advanced Bash scripting guide and cheat sheet covers from advanced parameter expansion techniques, process substitution and signal handling to namerefs and indirection, advanced argument parsing, I/O redirection and even parallelization. Take bash scripting to the next level.

Bash scripting guide and cheat sheet

While there are many tutorials about Bash scripting on the Internet, this one focuses on presenting the information in a cheat sheet style, so you can jump right into coding without wasting your time. From the very beginning to intermediate and advanced topics.

The System V to-the-point guide and cheat sheet

System V is the classic Linux init system, this article is a to-the-point guide and cheatsheet intended to help you quick access to all System V commands, directories and tools.

The systemd to-the-point guide and cheat sheet

Systemd is currently the fastest growing Linux and widely adopted service manager and init system. This part guide, part cheatsheet will give you all the commands in a neatly organized fashion so you can master it and become a proficient Linux power user.

An Introduction to Linux Init Systems and their evolution through time

An init system (short for “initialization system”) is the parent of all userspace processes on a Unix-like operating system, from System V to systemd, the history and evolution of init systems.

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