Linux Commands

Command references for core Linux tools, syntax, examples, and practical one-liners.

Oct 5, 2026 • 14 min read

Linux ip Command with Examples

How to use the Linux ip command to show and assign IP addresses, bring interfaces up or down, and manage routes, with ip a and ip -br output explained.

Oct 5, 2026 • 9 min read • series

chown Command in Linux: Change File Ownership

Use the chown command in Linux to change file and directory ownership, including recursive changes, symbolic links, and practical ownership examples.

Creating directories in Linux with the mkdir command

Oct 5, 2026 • 7 min read

How to Create a Directory in Linux: mkdir Command Examples

Create single, multiple, and nested directories in Linux with mkdir, set permissions with -m, and fix 'Permission denied' and 'No such file or directory' errors.

Oct 4, 2026 • 10 min read • new

sqlite3 Command Line: Create and Query SQLite Databases

Create and query SQLite databases with sqlite3 on Linux. Import CSV files, format query results, and back up or restore your data.

SQLite database file labeled tasks.db with a SELECT query and a table of rows

Oct 4, 2026 • 11 min read

How to Check CPU Usage in Linux

This guide explains how to check CPU usage in Linux with top, htop, mpstat, vmstat, sar, ps, uptime, and per-core load tools.

Checking CPU usage in Linux with terminal monitoring tools

Oct 4, 2026 • 11 min read

modprobe Command in Linux: Load and Manage Kernel Modules

modprobe adds and removes Linux kernel modules along with their dependencies. See how to pass parameters, blacklist drivers, load modules at boot, and fix errors.

Gold hexagonal tiles with terminal and gear icons and the label modprobe command

Oct 3, 2026 • 5 min read

How to Rename a Directory or Folder in Linux

Rename a folder in Linux with mv, avoid the move-inside-existing-directory trap with -T, and batch rename directories using loops, find, and rename.

Rename Directories in Linux title on a yellow background

Oct 3, 2026 • 9 min read

git fetch vs git pull: What Is the Difference?

git fetch downloads remote changes without touching your branch, while git pull also merges or rebases them. See when to use each and how to fix pull errors.

Comparing git fetch and git pull commands in Git

Oct 1, 2026 • 13 min read

nmap Command in Linux with Practical Examples

Practical nmap examples for Linux: find live hosts, scan specific or top ports, run sudo nmap SYN scans, detect service versions, and speed up scans with -T4.

Oct 1, 2026 • 8 min read

Linux patch Command: Apply Diff Files

The Linux patch command applies diff files to your original files. Examples cover creating a patch with diff, testing it with --dry-run, -p1 for Git patches, backups, and reversing changes.

Using the Linux patch command to apply diff patch files

Sep 30, 2026 • 9 min read • new

How to Diagnose OOM Killer Events in Linux

Diagnose Linux OOM kills with dmesg and journalctl, identify affected processes, check service memory limits, and investigate systemd-oomd events.

Rising memory usage bars above a Linux log with a highlighted Killed process entry

Sep 29, 2026 • 13 min read

How to Use the Linux ftp Command to Transfer Files

Transfer files to and from a remote server using the Linux ftp command. Covers connections, downloads, uploads, passive mode, and scripted transfers.

Terminal session showing an FTP file transfer in progress

Sep 28, 2026 • 14 min read • series

fdisk Command in Linux: Create Disk Partitions

Use the fdisk command in Linux to list disks, create GPT or MBR partitions, change partition types, format new partitions, and mount them safely.

Terminal showing fdisk partition table output

Sep 28, 2026 • 12 min read

timedatectl Command in Linux: Manage Time, Date, and Time Zone

Check and change the system time, time zone, and NTP sync with timedatectl, plus how to see and set NTP servers with chrony or systemd-timesyncd.

timedatectl command output showing system time and time zone in a Linux terminal

Sep 27, 2026 • 12 min read

How to Check Listening Ports in Linux: ss, netstat, lsof

Use ss, netstat, or lsof to list all listening ports in Linux, identify which process is using a specific port, and filter results by protocol or port number.

Sep 27, 2026 • 8 min read

How to Unzip Files in Linux

Extract ZIP archives in Linux with the unzip command: unzip to a folder, handle password-protected and multiple archives, list or test contents, and exclude files.

Sep 27, 2026 • 5 min read

How to Check Linux Version: Distro and Kernel Commands

Terminal commands that show your Linux distribution, release number, and kernel version, including the exact point release on Debian and RHEL systems.

Sep 26, 2026 • 10 min read

rename Command in Linux: Rename Multiple Files

Batch rename files in Linux with the rename command using Perl regular expressions. Includes syntax, examples, and tips for the Perl and C versions.

Terminal showing rename command renaming multiple files

Sep 25, 2026 • 12 min read • series

dd Command in Linux: Copy Disks, Partitions, and Files

This guide explains how to use the dd command in Linux to write ISO images, clone disks, back up partitions, wipe drives, and test disk speed.

Using the dd command to copy disks, partitions, and files in Linux

Sep 25, 2026 • 13 min read • series

How to Mount and Unmount File Systems in Linux

Mount and unmount file systems in Linux with the mount and umount commands. Examples cover USB drives, ISO files, NFS shares, bind mounts, and persistent /etc/fstab entries.