Cheatsheets
Cheatsheets are compact, copy-paste friendly references for common Linux commands and tools, so you can find syntax, options, and examples quickly.
Bash Parameter Expansion Cheatsheet
Bash parameter expansion syntax for default values, substrings, prefix and suffix removal, search and replace, case conversion, and arrays.
Bash Keyboard Shortcuts Cheatsheet
Bash keyboard shortcuts for editing commands, searching history, completing words, and controlling foreground jobs.
Claude Code Cheatsheet
Quick reference for Claude Code in the terminal: session flags, print mode for scripts, slash commands, keyboard shortcuts, permission rules, MCP servers, hooks, and config file locations.
Job Control Cheatsheet
Quick reference for Bash job control: background jobs, jobs, fg, bg, wait, and keeping processes alive after logout with disown, nohup, and setsid
usermod Cheatsheet
Quick reference for modifying Linux user accounts with usermod and managing groups with groupadd, gpasswd, and groupdel
Apache Cheatsheet
Apache HTTP Server at a glance: service commands, file layout on Ubuntu and RHEL, virtual hosts, modules, .htaccess, redirects, TLS, reverse proxy, and log formats.
SSH Config Cheatsheet
SSH client config directives at a glance: Host and Match patterns, keys, jump hosts, keepalives, multiplexing, port forwarding, host key checking, and tokens for ~/.ssh/config.
SQLite Cheatsheet
SQLite command-line reference for opening databases, running SQL, formatting results, importing CSV files, and making backups.
systemd Unit File Cheatsheet
systemd unit file directives at a glance: [Unit] dependencies, service types, Exec commands, restart policy, users and environment, resource limits, hardening, timers, and drop-in overrides.
GitHub CLI Cheatsheet
gh at a glance: authentication, repositories, pull requests, issues, GitHub Actions runs and secrets, releases, search, extensions, and the API.
sudo Cheatsheet
sudo at a glance: running commands as root, credential caching, environment handling, sudoers rule syntax, aliases, Defaults, and logging.
Nginx Cheatsheet
Nginx directives at a glance: server blocks, location matching, reverse proxy headers, TLS, redirects, rate limits, caching, and log formats.
ffmpeg Cheatsheet
Keep essential ffmpeg commands close at hand, from stream inspection and lossless remuxing to CRF encoding, filters, subtitles, and GPU acceleration.
pnpm Cheatsheet
Quick reference for pnpm commands covering installation, dependencies, lockfiles, scripts, workspace filtering, the package store, and Node.js runtimes
PHP Cheatsheet
PHP 8 quick reference for syntax, arrays, functions, classes, request data, files, JSON, exceptions, CLI commands, Composer, configuration, and PHP-FPM.
Regex Cheatsheet
Regex syntax and examples for Linux tools, including metacharacters, quantifiers, character classes, anchors, groups, BRE, ERE, and PCRE
parted Cheatsheet
Quick reference for parted commands: inspect disks, create GPT and MBR tables, add aligned partitions, manage flags, resize boundaries, and remove partitions safely
nmap Cheatsheet
Quick reference for host discovery, port scanning, and service detection with nmap in Linux
AWS CLI Cheatsheet
Quick reference for AWS CLI commands, profiles, and output filtering
mount Cheatsheet
Quick reference for the mount command: mount and unmount filesystems, mount options, UUID and label mounts, network shares, and /etc/fstab entries
head Cheatsheet
Quick reference for showing the first lines or bytes of files and limiting command output with head in Linux
sha256sum Cheatsheet
Quick reference for generating and verifying SHA-256 and MD5 checksums with sha256sum, md5sum, and related Linux hash commands
Docker Compose Cheatsheet
Docker Compose quick reference: lifecycle commands, Compose file directives, health checks, environment variables, profiles, scaling, and cleanup.
Markdown Cheatsheet
Quick reference for Markdown syntax covering headings, formatting, links, images, lists, tables, code blocks, blockquotes, and common extensions.
uniq Cheatsheet
Quick reference for filtering and counting duplicate lines with uniq in Linux
date Cheatsheet
Quick reference for the Linux date command covering display formats, format specifiers, relative dates, timezones, Unix timestamps, and setting the system clock.
pip Cheatsheet
Quick reference for pip commands covering package installation, version constraints, requirements files, upgrades, virtual environments, and configuration.
cut Cheatsheet
Quick reference for extracting fields, bytes, and characters with cut in Linux
dig Cheatsheet
Quick reference for querying DNS records, tracing resolution, and debugging name resolution with dig
Ansible Cheatsheet
Quick reference for Ansible commands, inventories, playbooks, modules, and vault