Cheat Sheets

apt Cheat Sheet: Ubuntu & Debian Package Management

apt quick reference. Install, remove, update, upgrade, search, and manage packages on Ubuntu and Debian.

4 min read

Beginner

chmod Cheat Sheet: Linux File Permissions Explained

chmod quick reference. Numeric and symbolic modes, ownership, special permissions, and common patterns.

6 min read

Beginner

grep, sed & awk Cheat Sheet: Linux Text Processing

grep, sed, awk quick reference. Search, filter, replace, extract columns, and transform text in Linux.

6 min read

Intermediate

Kubernetes Cheat Sheet: kubectl Commands and Concepts

Kubernetes quick reference. kubectl commands, pods, deployments, services, scaling, debugging, and YAML templates.

6 min read

Intermediate

Python Cheat Sheet: Syntax, Data Types, Functions, and More

Python quick reference. Variables, strings, lists, dicts, loops, functions, classes, files, and error handling.

7 min read

Beginner

SSH Cheat Sheet: Every Command You Need

SSH quick reference. Connect, copy files, tunnels, keys, port forwarding, config file, and troubleshooting.

6 min read

Beginner

tmux Cheat Sheet: Sessions, Windows, Panes, and Shortcuts

tmux quick reference. Sessions, windows, panes, key bindings, copy mode, and configuration.

7 min read

Intermediate

Vim Cheat Sheet: Every Command You Need to Know

Vim quick reference. Modes, navigation, editing, search/replace, buffers, macros, and vimrc config.

6 min read

Intermediate

WSL Cheat Sheet: Windows Subsystem for Linux

WSL quick reference. Install, manage distros, files, networking, Docker, VS Code, systemd, and troubleshooting.

6 min read

Beginner

YAML Cheat Sheet: Syntax, Data Types, and Common Patterns

YAML syntax reference. Strings, lists, maps, multiline, anchors, and patterns for Docker, K8s, and CI/CD.

4 min read

Beginner

Bash Scripting Cheat Sheet: Variables, Loops, Functions, and More

Bash scripting quick reference. Variables, if/else, loops, functions, string ops, arrays, and error handling.

6 min read

Intermediate

curl Cheat Sheet: HTTP Requests, APIs, Downloads, and Debugging

curl quick reference. HTTP methods, headers, auth, file upload, cookies, SSL, and API debugging.

4 min read

Beginner

Docker Cheat Sheet: Every Command You Actually Need

Quick reference for Docker commands. Containers, images, volumes, networks, Compose, and debugging.

5 min read

Intermediate

Git Cheat Sheet: Every Command You Need (With Examples)

Quick reference for Git commands. Branching, merging, rebasing, stashing, undoing mistakes, and more.

5 min read

Beginner

iptables Cheat Sheet: Firewall Rules That Actually Make Sense

iptables firewall rules with real examples. Block IPs, open ports, rate limiting, NAT, and server protection.

6 min read

Intermediate

Linux Commands Cheat Sheet: 100+ Essential Commands

100+ Linux commands with examples. Files, networking, processes, users, disks, and system administration.

6 min read

Beginner

Networking Commands Cheat Sheet: ip, ss, dig, tcpdump, and More

Networking commands reference. ip, ss, dig, nslookup, traceroute, tcpdump, nmap, and troubleshooting.

5 min read

Intermediate

Nginx Cheat Sheet: Configuration, Reverse Proxy, SSL, and More

Nginx quick reference. Server blocks, reverse proxy, SSL, redirects, load balancing, and security headers.

4 min read

Intermediate

SQL Cheat Sheet: Queries, Joins, Functions, and More

SQL quick reference. SELECT, JOINs, GROUP BY, subqueries, indexes, and common patterns for all databases.

6 min read

Beginner

systemd Cheat Sheet: systemctl, journalctl, Services, and Timers

systemd quick reference. systemctl commands, journalctl logs, custom services, timers, and troubleshooting.

4 min read

Intermediate

UFW Firewall Cheat Sheet: Simple Firewall for Ubuntu and Debian

UFW firewall quick reference. Allow ports, block IPs, manage rules, and secure your Ubuntu/Debian server.

4 min read

Beginner

WireGuard VPN Setup Guide: Server and Client Configuration

Set up WireGuard VPN from scratch. Server config, client setup, key generation, firewall, and mobile.

8 min read

Intermediate