Author: Chetan Soni (Cyber Security Expert)

Linux Find Command Tutorial – How to Find Files on Linux

Finding files on a Linux system can be challenging, especially when you don't remember the exact filename or location. Fortunately, the find command is one of the most powerful file-searching…

Chetan Soni October 24, 2026

Linux

How to Install and Configure Caddy on Ubuntu

Caddy is a modern web server that makes website hosting and reverse proxy configuration simple. One of its biggest advantages is automatic HTTPS, which allows you to secure websites without…

Chetan Soni October 24, 2026

Linux

How to Install Wazuh All-in-One Docker Deployment on Ubuntu

Wazuh is an open-source security platform that provides threat detection, vulnerability assessment, file integrity monitoring, log analysis, incident response, and security event management. Running Wazuh with Docker simplifies deployment by…

Chetan Soni October 24, 2026

Linux

How to Install LEMP Stack on Ubuntu (Nginx, MySQL 8.4, PHP 8.5)

Setting up a web server is one of the first tasks when deploying PHP applications such as WordPress, Laravel, Magento, or custom PHP projects. A popular choice is the LEMP…

Chetan Soni October 23, 2026

Linux

How to Work with Substrings and Text Extraction in Linux Using awk, cut, grep, sed, xargs, expr, and Bash

Working with text is a common task in Linux, whether you're processing log files, cleaning data, parsing configuration files, or writing shell scripts. Linux provides several powerful command-line tools that…

Chetan Soni October 23, 2026

Linux

How to Track User Logins on Linux Using who, last, ac, lslogins, and lastlog

Monitoring user login activity is an important part of Linux system administration. Whether you're troubleshooting access issues, auditing user activity, or simply checking who is using a server, Linux provides…

Chetan Soni October 23, 2026

Linux

How to Set Up Ubuntu Server with Nginx, PHP, MySQL, SSL, Composer, and Adminer

Setting up a production-ready Ubuntu server typically involves installing a web server, database server, PHP runtime, and security tools. In this tutorial, you'll learn how to configure an Ubuntu server…

Chetan Soni October 23, 2026

Linux

How to Install SuiteCRM on Ubuntu Server (Step-by-Step Guide)

SuiteCRM is a powerful open-source Customer Relationship Management (CRM) platform that helps businesses manage sales, marketing, customer support, and related workflows from a single interface. Installing it on an Ubuntu…

Chetan Soni October 23, 2026

Linux

Linux Echo Command Explained – Syntax, Examples, File Redirection & Best Practices

The echo command is one of the most commonly used commands in Linux and Unix-based systems. Whether you're displaying text on the terminal, printing environment variables, creating configuration files, or…

Chetan Soni October 23, 2026

Linux

How to Install and Secure Webmin on Linux

Webmin is a powerful web-based system administration panel that allows you to manage Linux servers through an easy-to-use browser interface. With Webmin, you can handle user accounts, web servers, databases,…

Chetan Soni October 22, 2026

Linux

How to Install AnyDesk on Linux (Debian and Kali Linux)

AnyDesk is a popular remote desktop application that allows you to access and manage systems remotely. On Debian-based distributions such as Debian and Kali Linux, the recommended installation method is…

Chetan Soni October 22, 2026

Linux

How to Transfer Files Securely Using SCP on Linux

SCP (Secure Copy Protocol) is one of the easiest and most reliable ways to transfer files between Linux systems over a secure SSH connection. Whether you need to copy backups…

Chetan Soni October 22, 2026

Linux

How to Enable SSH Two-Factor Authentication (2FA) on Ubuntu with Google Authenticator

Securing SSH access is one of the most important steps in protecting an Ubuntu server. Password-only logins can be vulnerable if credentials are leaked or stolen. By enabling two-factor authentication…

Chetan Soni October 22, 2026

Tech

[PHP2Shell] How to Check PHP Servers for CVE-2026-109618 and CVE-2026-109619

Two critical vulnerabilities in the PHP programming language have raised concerns for organizations running PHP-powered websites and web applications. Tracked as CVE-2026-109618 and CVE-2026-109619, these vulnerabilities, collectively associated with the…

Chetan Soni October 22, 2026

Linux

How to Install and Secure MySQL on Ubuntu

MySQL is one of the most widely used relational database management systems for web applications, software development, and server environments. If you're setting up a new Ubuntu system, installing and…

Chetan Soni October 22, 2026

Tech

Major Cybersecurity Incidents: eMudhra, SBI Data Breach, PHP2Shell, Node.js and LiteLLM Security Risks

The cybersecurity landscape is facing a series of serious security challenges, from certificate authority vulnerabilities and customer data exposure to critical remote code execution flaws and software supply-chain attacks. Recent…

Chetan Soni October 22, 2026

Tech

eMudhra Certificate Compromise Triggers Global Security Response After Eight CA Keys Exposed

A major internet security incident has prompted emergency action from browser makers and software vendors after the private keys associated with eight certificate authority (CA) certificates operated by eMudhra were…

Chetan Soni October 21, 2026

Linux

How to Install MongoDB and Create Your First Database and Collection

MongoDB is one of the most popular NoSQL databases used for storing and managing flexible, document-based data. Before you can start building applications with MongoDB, you need to install the…

Chetan Soni October 21, 2026

Linux

Linux Head Command Tutorial – How to View the First Lines and Bytes of Files

The head command is one of the most useful Linux utilities for quickly previewing file contents. Whether you're checking a log file, examining a CSV dataset, validating command output, or…

Chetan Soni October 20, 2026

Linux

How to Install and Configure Elasticsearch 8 on Linux

Elasticsearch is a powerful search and analytics engine used for log management, full-text search, observability, security analytics, and more. In this tutorial, you'll learn how to install Elasticsearch 8, configure…

Chetan Soni October 20, 2026