Linux and DevOps Cheat Sheets

Learn how to use the dpkg command in Linux with practical examples. This cheat sheet covers installing and removing .deb packages, fixing broken packages, querying installed software, force operations, downgrading …

Learn how to split files in Linux using csplit and split commands. Covers pattern-based splitting, size-based splitting, prefixes, suffixes, and how to rejoin files.

Learn how to use the cut command in Linux with clear, practical examples. This guide covers selecting bytes, characters, and fields, working with delimiters, ranges, complements, and common real-world text-processing use …

A complete DNF command cheat sheet for Linux with practical examples. Learn how to use dnf to install, update, remove packages, manage repositories, work with package groups, undo transactions, and troubleshoot common …

Learn how to use the crontab command in Linux with practical examples. Understand cron syntax, scheduling formats, special time strings, managing user crontabs, debugging cron jobs, and best practices.

Learn how to create symbolic links in Linux using the ln command. Understand soft links vs hard links, when to use each, and how to verify, find, and remove symlinks with practical examples.

Learn how to use the curl command in Linux with clear, practical examples. This cheat sheet covers downloading files, HTTP headers, silent mode, redirects, POST requests, authentication, and common troubleshooting use …

Learn the cpio command in Linux with clear, practical examples. Understand copy- in, copy-out, and pass-through modes, create and extract archives, preserve permissions, work with initramfs, and compare cpio with tar.

Learn dmidecode with practical examples to read SMBIOS/DMI data in Linux. Get BIOS version, system manufacturer, serial number, UUID, memory slot details, and CPU information, plus troubleshooting for permission errors …

Learn how to use the chown command in Linux to change file and directory ownership safely. Covers recursive chown, symbolic links, --from, --reference, verbose output, and best practices.

Learn how to use the screen command in Linux to manage persistent terminal sessions. Includes examples to list, attach, detach, rename, log, and close screen sessions with practical shortcuts.

Learn how to use the cmp command in Linux to compare files byte by byte. Includes practical examples, options like -l, -b, -s, exit codes, and real-world scripting use cases.

Learn how to use chmod recursive (-R) in Linux with clear examples. Change permissions for all files or directories using 755 or 777, avoid common mistakes, and restore permissions safely.

Learn how to use the chage command in Linux to manage password expiry, account aging, inactivity locks, and user expiration with practical examples and best practices.

Learn the chattr command in Linux with 11 practical examples. Understand file attributes, immutable files, append-only mode, and how to use lsattr to inspect attributes.

Learn how to use the chgrp command in Linux to change group ownership of files and directories. Includes recursive usage, sudo examples, symbolic links, error handling, and a quick reference cheat sheet.

Learn Linux Access Control Lists (ACL) with clear explanations and practical examples. Understand when to use setfacl vs chacl, how to inspect, change, remove, and apply ACLs recursively on files and directories, and …

Learn the cat command in Linux with simple, practical examples. This beginner- friendly cheat sheet covers syntax, file creation, appending, line numbers, whitespace detection, and concatenating multiple files.

Learn the AWK command in Linux with practical examples. Covers syntax, patterns, columns, BEGIN/END blocks, loops, scripts, and real-world use cases.

Learn how to use the apt-cache command in Ubuntu and Debian to search packages, inspect package policy, analyze dependencies, and debug APT issues with clear, practical examples.

Learn the apt command in Linux with 15 practical examples. This APT commands cheat sheet covers installing, removing, updating, upgrading, searching, and managing packages on Debian-based systems.

Learn the bzip2 command in Linux with practical examples. Compress and extract files and directories, verify integrity, optimize performance, and compare bzip2 with gzip and xz.

Learn the adduser command in Linux with syntax, options, and 15 practical examples. Create users, system users, groups, set UID, GID, GECOS, shells, and home directories on Ubuntu and Debian systems.

mdadm command is used for building, managing, and monitoring Linux md devices (aka RAID arrays). RAID devices are made up of multiple storage devices that are

rpmbuild command in Linux is used to build RPM packages. An RPM package is of two types: source RPM and binary RPM. A binary package contains the software to

How to create a swap file in Linux? Different examples to use swapon command Enable all swaps devices and files, Display swap usage summary, Disable all swap devices and files, Reinitialize the swap space, Display swap …

tune2fs command examples, tune2fs uuid, tune2fs example, tune2fs xfs, tune2fs reserved space, man tune2fs, tune2fs command allows to mcq, tune2fs has journal

Manage loop devices in Linux using losetup command. Complete cheat sheet on using losetup command with examples

Multiple mke2fs command examples in Linux with cheat sheet for different scenarios.

Capture TCP or UDP packets using tcpdump command in Linux. Capture packet for specific interface, specify source and destination.