Bash

Overview While practicing Linux fundamentals through OverTheWire-style wargames, I built a set of notes and small scripts focused on understanding how Linux systems behave from a security and attacker-observer perspective. This post does not contain level solutions or flags. Instead, it documents concepts, techniques, and automation patterns that are directly applicable to: penetration testing, CTF-style challenges, and real-world Linux enumeration. The goal is to show how to think, not what to solve. ...

Introduction Bash is the scripting language used to interact directly with Unix‑based operating systems through the shell. It allows administrators and security practitioners to automate repetitive tasks, chain command‑line utilities, and process large volumes of data efficiently. In modern environments, Bash is not limited to Linux systems, as Windows provides compatibility through the Windows Subsystem for Linux, enabling cross‑platform usage. In enterprise and security‑focused environments, Bash scripting becomes essential due to the scale and velocity of data handled daily. Analysts frequently rely on scripts to enumerate systems, filter logs, test connectivity, and orchestrate reconnaissance or defensive workflows. Instead of manually executing dozens of commands, a single well‑designed script can perform complex logic reliably and repeatably. ...