Install Splunk on RHEL 9 or CentOS 9: A Beginner’s Guide
Learn how to install Splunk on RHEL9 or CentOS 9 with this beginner-friendly guide. Step-by-step instructions, CLI examples, and troubleshooting tips included. Table of Contents đIntroduction Splunk is one of the most widely-used platforms for searching, monitoring, and analyzing machine-generated big data. Whether youâre managing logs, monitoring system performance, or troubleshooting issues, Splunk is an […]
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 […]
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 […]
Set Up VLANs Using NMCLI on RHEL 9
Learn how to set up VLANs using nmcli on RHEL 9 with this step-by-step guide. Includes CLI examples, troubleshooting tips, and best practices for configuring VLAN interfaces in a Linux environment. Table of Contents đIntroduction In modern enterprise networks, Virtual LANs (VLANs) are essential for segmenting traffic, improving security, and optimizing performance. On Red Hat Enterprise […]
How to Configure Secure TLS Settings in Apache on RHEL 9 | CentOS Stream 9
Secure your Apache web server on RHEL 9 or CentOS Stream 9 with a hardened TLS configuration. Learn how to enable TLS 1.2/1.3, enforce strong ciphers, configure HSTS, and test your setup. Table of Contents đIntroduction Transport Layer Security (TLS) is the backbone of modern web encryption, ensuring data transmitted between clients and servers remains […]
Text Processing Tools in Linux: sed and awk Explained
Master Linux text processing: learn how to use sed for quick edits and awk for powerful field-based reports, with examples, tips, and command pipelines. Table of Contents đ Introduction In the world of Linux commandâline text processing, two tools reign supreme: sed (stream editor) and awk (pattern scanning and processing language). These tools provide extraordinary flexibility for transforming, filtering, […]