These guides focus on practical Linux skills, primarily on Red Hat-based distributions. They're useful for RHCSA prep, general sysadmin work, or anyone building their Linux foundations.
Guides in this section
Red Hat Directory Structure
A walkthrough of the Red Hat (RHEL/CentOS/Fedora) filesystem hierarchy — what lives
where and why, from /etc to /var to /proc.
File Globbing Cheat Sheet
Quick reference for shell globbing patterns — wildcards, character classes, brace expansion, and practical examples for matching files by name or extension.
One-Liner Examples
A collection of useful Linux one-liners for common tasks — filtering output, processing text, managing processes, and working with files.
Managing Linux Users Cheat Sheet
Commands and options for creating, modifying, and removing users and groups on Linux.
Covers useradd, usermod, userdel, passwd,
and related tools.