Cheatsheets
Cheatsheets are compact, copy-paste friendly references for common Linux commands and tools, so you can find syntax, options, and examples quickly.
export Cheatsheet
Quick reference for exporting shell variables and functions to child processes with export in Bash
env Cheatsheet
Quick reference for listing, clearing, and overriding environment variables with env in Linux
Python Cheatsheet
Quick reference for Python 3 syntax, data types, string and list methods, control flow, functions, file I/O, and exception handling.
kill Cheatsheet
Quick reference for sending signals to processes by PID with kill and killall in Linux
watch Cheatsheet
Quick reference for rerunning commands at intervals and monitoring output changes with watch in Linux
tcpdump Cheatsheet
Quick reference for capturing and filtering network packets with tcpdump in Linux
su Cheatsheet
Quick reference for switching users and running commands with su in Linux
ping Cheatsheet
Quick reference for testing network reachability and latency with ping in Linux
xargs Cheatsheet
Quick reference for building commands from standard input with xargs in Linux
wc Cheatsheet
Quick reference for counting lines, words, bytes, characters, and longest line length with wc in Linux
useradd Cheatsheet
Quick reference for creating Linux users with useradd, including home directories, shells, groups, and account policies
less Cheatsheet
Quick reference for navigating, searching, and controlling output with the less pager in Linux
pkill Cheatsheet
Quick reference for finding and terminating processes by name, user, and pattern with pkill in Linux
ln Cheatsheet
Quick reference for creating hard links and symbolic links with ln in Linux
tee Cheatsheet
Quick reference for splitting command output to terminal and files with tee in Linux
gzip Cheatsheet
Quick reference for compressing, listing, testing, and decompressing files with gzip and gunzip in Linux
cat Cheatsheet
Quick reference for viewing, combining, and redirecting file content with cat in Linux
sort Cheatsheet
Quick reference for sorting text lines with sort in Linux
ps Cheatsheet
Quick reference for listing and filtering processes with ps in Linux
cp Cheatsheet
Quick reference for copying files and directories with cp in Linux
chown Cheatsheet
Quick reference for changing file and directory ownership with chown in Linux
rm Cheatsheet
Quick reference for removing files and directories safely with rm in Linux
mv Cheatsheet
Quick reference for moving and renaming files and directories with mv in Linux
ls Cheatsheet
Quick reference for listing files and directories with ls in Linux
ZIP/UNZIP Cheatsheet
Quick reference for creating, listing, testing, and extracting ZIP archives in Linux
IP Command Cheatsheet
Quick reference for using ip command to manage addresses, routes, links, and network diagnostics in Linux
DNF Cheatsheet
Quick reference for package management with dnf on Fedora, RHEL, and derivatives
MySQL/MariaDB Cheatsheet
Quick reference for common MySQL and MariaDB command-line administration tasks
UFW Cheatsheet
Quick reference for managing firewall rules with UFW on Linux
chmod Cheatsheet
Quick reference for changing file and directory permissions with chmod in Linux