How to Monitor SSH Logins Using Auditd and Logwatch
Learn how to monitor SSH logins using Auditd and Logwatch on Linux. This step-by-step guide covers setup, configuration, log analysis, and reporting to enhance server security. Table of Contents đIntroduction Secure Shell (SSH) is one of the most widely used methods for remote server administration. Because it provides a gateway into critical infrastructure, monitoring SSH […]
Configure a Firewall using UFW (Ubuntu) and Firewalld (RHEL)
Learn how to configure a Linux firewall using UFW on Ubuntu and Firewalld on RHEL. Step-by-step CLI examples, best practices, and comparison tables included. Table of Contents đIntroduction Securing your Linux server is a critical step in system administration. One of the foundational layers of server security is the firewall â a system that controls […]
How to Configure SSL for Splunk Enterprise on RHEL 9 | CentOS 9
Learn how to configure SSL for Splunk Enterprise on RHEL 9 or CentOS 9. This detailed guide covers certificate generation, secure web interface setup, and SSL forwarding configuration for maximum security. Table of Contents đIntroduction Securing your Splunk Enterprise deployment is crucial, especially when dealing with sensitive data and enterprise-level monitoring. One of the most […]
Install MongoDB on RHEL 10 | CentOS 10
Learn how to install MongoDB (Community or Enterprise) on RHELâŻ10 / CentOSâŻ10 with stepâbyâstep repository setup, CLI commands, SELinux tips, and troubleshooting.â Table of Contents đIntroduction MongoDB is a leading NoSQL document database often used in production and development environments. If your organization is running RHEL 10 or CentOS 10, you may want to deploy […]
Fixing the Apache Error: Invalid Command ‘Header’
Learn how to fix the Apache error “Invalid command ‘Header’” when configuring a web server. Step-by-step guide with CLI commands, configuration examples, and troubleshooting tips to get your Apache server running smoothly. Table of Contents đIntroduction When running a web server, nothing is more frustrating than Apache failing to start because of a cryptic configuration […]
Install XRDP on Ubuntu 24.04 for Remote Desktop Access
Learn how to install and configure XRDP on Ubuntu 24.04 LTS to enable secure remote desktop access from Windows, macOS, or Linux. Stepâbyâstep setup with firewall rules, troubleshooting tips and performance/security best practices. Table of Contents đIntroduction Remote desktop access to Linux machines is essential for administrators, remote workers, developers, or anyone needing GUI access […]
20 Commonly Used SPL Commands in Splunk (With Examples)
Explore 20 commonly used SPL commands in Splunk, with example queries for stats, timechart, eval, eventstats, streamstats, rex, and more. Boost your Splunk search skills and write better dashboards and alerts. Table of Contents đIntroduction If you’re learning Splunk or even if you’ve been using it a while, knowing the right SPL (Search Processing Language) […]
How to Safely Migrate from MySQL to PostgreSQL (Step-by-Step)
Learn how to safely migrate your MySQL database to PostgreSQL with this step-by-step guide. Get tips on tools, data migration, schema conversion, and performance optimization. Table of Contents đIntroduction Migrating from MySQL to PostgreSQL is an important yet sometimes tricky process. Whether you’re moving to PostgreSQL for better performance, richer features, or scalability, understanding the […]
Upgrade to PHP 8.4 on Ubuntu 22.04 | 24.04
Upgrade to PHPâŻ8.4 on UbuntuâŻ22.04 orâŻ24.04 with this complete, stepâbyâstep guide. Includes commands, configuration, Apache & Nginx setup, troubleshooting, and best practices to ensure a smooth migration. Table of Contents đIntroduction Modern PHP releases bring faster execution, new features, and better security. PHPâŻ8.4, though still developing in midâ2025, is increasingly adopted by developers. If you’re […]
How to Enable Fail2Ban to Block Repeated Failed Login Attempts on Linux
Learn how to configure Fail2Ban to block repeated failed login attempts on Linux. Step-by-step guide with commands, configuration examples, and security tips for SSH and other services. Table of Contents đIntroduction In todayâs threat landscape, brute-force attacks are a common way attackers attempt to gain unauthorized access to Linux servers. A simple and effective defense […]