Linux Commands
Command references for core Linux tools, syntax, examples, and practical one-liners.
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.
How to Create a systemd Service File in Linux
Create a systemd service file in Linux with step-by-step instructions for unit file structure, service types, restart policies, and service management with systemctl.
How to Create Users in Linux (useradd Command)
Learn how to create and add users in Linux with the useradd command, including home directories, passwords, groups, shells, UIDs, and other common account options.
Linux Watch Command
Use the watch command in Linux to run commands at regular intervals and monitor output changes in the terminal. Includes interval, highlighting, pipes, and practical examples.
xargs Command in Linux: Usage and Examples
The xargs command builds and executes commands from standard input. This guide covers the most useful xargs options with practical examples.
locate Command in Linux: Find Files Quickly
Search for files and directories by name using the locate command in Linux. Covers installation, database updates, pattern matching, and common options.
How to Truncate Files in Linux: Empty Files Without Deleting
Empty a file without deleting it using shell redirection or the truncate command. Covers permissions, sudo workarounds, and truncating log files.
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 binary transfers.
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.
pgrep Command in Linux: Find and Filter Running Processes
The pgrep command finds running processes by regex pattern, user, terminal, or parent PID and prints matching PIDs. This guide covers exact matching, filtering options, and script-friendly exit checks.
unlink Command in Linux: Remove a Single File
The unlink command removes a single file by deleting its directory entry. This guide explains how to use unlink, how it differs from rm, and what to expect when removing files and symbolic links.
uniq Command in Linux: Remove and Count Duplicate Lines
The uniq command removes or counts duplicate adjacent lines in a file. This guide explains how to filter duplicates, count occurrences, and use uniq with sort in pipelines.
ifconfig Command in Linux: Configure Network Interfaces
Configure and view network interfaces in Linux using ifconfig. Covers IP assignment, enabling and disabling interfaces, MTU, MAC address changes, and modern ip command equivalents.
groupdel Command in Linux: Delete a Group
Learn how to delete a Linux group using the groupdel command. Covers syntax, verification, handling primary group errors, and what happens to files owned by the deleted group.
top Command in Linux: Monitor Processes in Real Time
The top command displays running processes and system resource usage in real time. This guide covers sorting, filtering, load metrics, and key interactive controls.
usermod Command in Linux: Modify User Accounts and Groups
The usermod command modifies user account attributes such as groups, shell, home directory, username, and expiry date. This guide covers all common options with examples.
sort Command in Linux: Sort Lines of Text
The sort command sorts lines of text files alphabetically or numerically. This guide covers sorting by column, reverse order, unique lines, and combining sort with other commands.
wall Command in Linux: Broadcast Messages to Logged-In Users
The wall command broadcasts a message to the terminals of all logged-in users in Linux. This guide covers sending messages from arguments, files, and pipes, with group targeting and banner control.
journalctl Command in Linux: Query and Filter System Logs
journalctl queries the systemd journal and lets you filter logs by unit, time, priority, boot, and process. This guide covers the most useful journalctl options with practical examples.
stat Command in Linux: Display File and Filesystem Information
The stat command displays detailed file and filesystem information in Linux, including size, permissions, inode number, and timestamps. This guide covers all major stat options with examples.
