Linux & System Administration
CodeSnippets
1 item
Essential Bash Variables for Every Script
- Shell scripting
- Devops
- 26 Dec 2025
- 07 Mins read
Overview Quick Tip You know what's worse than writing scripts? Writing scripts that break every time you move them to a different machine. Built-in Bash variables fix that. The problem wi
Glossary
2 items
Linux Server Administration
- Linux
- 60 Terms
- 18 Apr 2026
This glossary covers essential Linux server administration concepts: system architecture, user management, networking, storage, process management, performance tuning, and security hardening.
Networking Fundamentals
- Networking
- Fundamentals
- 47 Terms
- 28 May 2026
This glossary covers the core networking concepts every developer, DevOps engineer, and system administrator should know: how data is layered and addressed, and how it gets routed across the internet.
Quizzes
4 items
Linux: System Administration Fundamentals
- Linux
- Operating Systems
- 20 Questions
- ~5 min
- 29 Jan 2026
- Level: Beginner
Welcome to the Linux Basics Quiz! This quiz covers fundamental Linux concepts, commands, and system administration best practices. Each question is multiple-choice, and you'll find hints to help you a
Bash: Shell Scripting Fundamentals
- Bash
- Shell Scripting
- 20 Questions
- ~5 min
- 30 Jan 2026
- Level: Beginner
Welcome to the Bash Basics Quiz! This quiz covers fundamental Bash scripting concepts, syntax, and best practices. Each question is multiple-choice, and you'll find hints to help you along the way. Go
PowerShell: Windows Scripting Fundamentals
- PowerShell
- Windows
- 20 Questions
- ~5 min
- 31 Jan 2026
- Level: Beginner
Welcome to the PowerShell Basics Quiz! This quiz covers fundamental PowerShell concepts, cmdlets, and scripting best practices. Each question is multiple-choice, and you'll find hints to help you alon
Git: Version Control Fundamentals
- Git
- Version Control
- 20 Questions
- ~5 min
- 06 Feb 2026
- Level: Beginner
Welcome to the Git Basics Quiz! This quiz covers fundamental Git concepts, version control workflows, and collaborative development best practices. Each question is multiple-choice, and you'll find hi
Cheatsheets
12 itemsAWK
- Terminal Tools
- 01 Jan 2023
AWK is a text processing language for pattern scanning and data extraction. Used to process text files, extract columns, and perform calculations on text data.
Bash
- Scripting
- 01 Jan 2023
Bash is a Unix shell and command language written by Brian Fox for the GNU Project as a free software replacement for the Bourne shell.
Chmod
- Terminal Tools
- 01 Jan 2023
Complete chmod reference with numeric and symbolic permissions, special bits, directory permissions, and practical examples for managing file access
Cron
- Terminal Tools
- 01 Jan 2023
Cron is a time-based job scheduler in Unix/Linux for running scripts or commands periodically. Covers crontab syntax, scheduling patterns, and management commands.
Curl
- Terminal Tools
- 01 Jan 2023
cURL is a command-line tool for making HTTP requests, transferring data using URLs, and testing APIs. Essential commands for web development and API testing.
Find
- Terminal Tools
- 01 Jan 2023
Complete find reference with file searching, filtering by type/size/time, permissions, advanced operations, and practical examples for locating files
Grep
- Terminal Tools
- 01 Jan 2023
Complete grep reference with pattern matching, regular expressions, flags, context options, and practical examples for searching text files
Netcat
- Terminal Tools
- 01 Jan 2023
Complete netcat reference covering TCP/UDP connections, file transfers, server testing, port scanning, banner grabbing, and network troubleshooting with practical examples
Netstat
- Terminal Tools
- 01 Jan 2023
Complete netstat reference covering network connections, listening ports, routing tables, and network statistics with practical examples
Sed
- Terminal Tools
- 01 Jan 2023
Complete sed reference with substitution, addressing, deletion, insertion, transformations, in-place editing, and real-world examples for text manipulation
SSH
- Terminal Tools
- 16 Jan 2025
SSH cheatsheet covering OpenSSH client usage, authentication methods, port forwarding, key management, X11 forwarding, and configuration options. Includes real-world examples and security best practices.
Linux Networking
- DevOps & Tools
- 21 Jul 2026
The commands you reach for to diagnose and manage Linux networks. ip for interfaces and routes, ss for sockets, dig for DNS, traceroute for paths, and tcpdump for packets.