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OSINT

Email to Profile: Social Media Search and Free Lookup Tools

Introduction Connecting an email address to a real person can reveal valuable insights. With email-to-profile...

OSINT

Advanced Free Email Lookup and Reverse Search Techniques

Introduction Email addresses are often the keys to digital identities. With the right tools, you...

How to Use Pentest Copilot in Kali Linux

Introduction Artificial Intelligence is changing how cybersecurity professionals work, especially in penetration testing. Tools that...

type Command in Linux: Show How the Shell Resolves a Name

By Cyber Defence on August 16, 2026

The type command in Linux shows how the current shell would interpret a name typed on the command line. It identifies aliases, functions, builtins, keywords, and executable files — giving you the full picture of what will actually run. type is a shell...

How to Check Memory Usage in Linux: free, top, and /proc/meminfo

By Cyber Defence on August 16, 2026

When a Linux system is slow or behaving unexpectedly, memory is one of the first things to check. This guide covers four methods to check RAM usage in Linux, from a quick summary to per-program breakdowns. How to Check Memory...

ip Command in Linux: Configure Interfaces, Routes, and ARP

By Cyber Defence on August 16, 2026

The ip command is the standard network configuration tool on modern Linux systems. It is part of the iproute2 package, installed by default on virtually every distribution. ip covers interface management, IP address assignment, routing, and ARP table operations in a single unified tool —...

chown Command in Linux: Change File and Directory Ownership

By Cyber Defence on August 16, 2026

Every file and directory in Linux has an owner (a user) and a group. Together with permission bits, these two attributes control who can read, write, or execute a file. The chown command in Linux changes the user and group ownership of...

Email to Profile: Social Media Search and Free Lookup Tools

By 0xSnow on November 3, 2025

Introduction Connecting an email address to a real person can reveal valuable insights. With email-to-profile searches, social media lookups, and reverse search tools, you can uncover linked accounts, public posts, and verified identities. This process is common in cybersecurity, recruiting,...

Advanced Free Email Lookup and Reverse Search Techniques

By 0xSnow on November 3, 2025

Introduction Email addresses are often the keys to digital identities. With the right tools, you can uncover social media profiles, online activity, and even business records associated with an email. This process, known as email lookup or reverse email search,...

How to Use Pentest Copilot in Kali Linux

By 0xSnow on November 1, 2025

Introduction Artificial Intelligence is changing how cybersecurity professionals work, especially in penetration testing. Tools that once required manual effort are now becoming smarter and more efficient. One of the most interesting AI-assisted tools available today is Pentest Copilot, developed by...

How to Use the Windows Registry to optimize and control your PC.

By Tamilselvan S on October 30, 2025

The Windows Registry Editor lets you easily view and control critical Windows system and application settings. It acts as a central hub, storing configuration information for your hardware, software, and personal preferences. Type regedit in the Start menu or the...

MQTT Security: Securing IoT Communications

By 0xSnow on October 30, 2025

In the rapidly expanding Internet of Things (IoT) ecosystem, billions of devices are constantly exchanging data from smart home appliances and industrial sensors to connected vehicles and healthcare monitors. Behind this seamless communication lies a lightweight protocol that powers most...

usermod Command in Linux: Modify User Accounts and Groups

By Cyber Defence on August 10, 2026

The usermod command in Linux modifies existing user account attributes. You can use it to manage group membership, change the home directory or login shell, rename a user, set an expiry date, and lock or unlock an account. Only root or users...

top Command in Linux: Monitor Processes and Resource Usage

By Cyber Defence on August 10, 2026

The top command in Linux provides a real-time view of running processes and system resource usage. From a single interactive screen you can check CPU load, memory consumption, load averages, and process activity all at once. How to Use the top Command...

How to Check Open Ports in Linux: nmap, netcat, and Bash

By Cyber Defence on August 11, 2026

When troubleshooting a network connection or configuring a firewall, the first question is whether a port is actually reachable. This guide covers three command-line methods for checking open ports in Linux: nmap, netcat, and the Bash /dev/tcp pseudo-device. What Is an Open...

wc Command in Linux: Count Lines, Words, Characters, and Bytes

By Cyber Defence on August 10, 2026

The wc command in Linux counts lines, words, characters, and bytes in files or standard input. It is most useful in shell pipelines where you need a quick count of output from another command. How to Use the wc Command in Linux...

groupdel Command in Linux: Remove a Group and Audit Files

By Cyber Defence on August 10, 2026

The groupdel command in Linux removes a group from the system. It deletes the group’s entry from /etc/group and /etc/gshadow, but does not delete or modify any files owned by that group. Only root or a user with sudo privileges can run groupdel. How the groupdel...