Let’s Encrypt provides free, automatically renewable TLS certificates, and Certbot is the recommended client for obtaining and managing them. On RHEL 8, the certbot and python3-certbot-nginx packages are available from the EPEL (Extra Packages for Enterprise Linux) repository. Once installed, Certbot can automatically obtain a certificate and modify your Nginx configuration to enable HTTPS. This […]
Apache virtual hosts allow a single Apache HTTP Server instance to respond to multiple domain names, each with its own document root, logs, and settings. On RHEL 8, virtual host configuration files are placed in /etc/httpd/conf.d/ and are automatically included by the main httpd.conf. This tutorial walks you through creating and enabling an Apache name-based […]
Nginx server blocks — equivalent to Apache’s virtual hosts — allow a single Nginx instance to serve multiple websites from one server. Each server block defines a distinct configuration scope that responds to specific domain names or IP addresses. On RHEL 8, additional server block configuration files are stored under /etc/nginx/conf.d/ and automatically loaded by […]
Apache HTTP Server (httpd) is one of the most widely deployed web servers in the world and is fully supported on RHEL 8 through the AppStream repository. After installing the httpd package, you will configure the firewall, review the main configuration file, and serve content from a custom document root. This tutorial covers everything you […]
Nginx is a high-performance web server and reverse proxy widely used in production Linux environments. On RHEL 8, Nginx is available through the AppStream repository, making installation straightforward with dnf. Once installed, you will need to configure the firewall and SELinux to allow web traffic. This tutorial walks you through a complete Nginx installation and […]
NetworkManager is the default network management stack on RHEL 8, and nmcli is its fully-featured command-line interface. Using nmcli, administrators can create, modify, activate, and delete network connections entirely from the terminal — no GUI or .ifcfg file editing required. This tutorial covers inspecting current network state, configuring a static IP address, managing connections, and […]
DNF (Dandified YUM) is the default package manager on RHEL 8, replacing the older yum command with improved dependency resolution, transaction history, and modular package support through AppStream. Whether you are installing software, managing module streams, or adding third-party repositories like EPEL, dnf is the single tool for the job. This tutorial covers daily package […]
The Linux Audit system (auditd) provides a comprehensive security logging framework that records system calls, file accesses, and user actions at the kernel level. On RHEL 8, auditd is installed and enabled by default, making it a foundational component of any security compliance strategy. Whether meeting requirements for PCI-DSS, HIPAA, or internal policy, audit rules […]
Text editors are an essential tool for every Linux system administrator, and RHEL 8 ships with access to both vim and nano through its default repositories. vim is a powerful modal editor favored for its speed and extensibility once the learning curve is overcome, while nano offers a straightforward, menu-driven experience suitable for quick edits. […]
The journalctl command is the primary interface for querying and browsing logs collected by systemd-journald on RHEL 8. Unlike traditional syslog files, the systemd journal stores structured, binary log data that can be filtered by unit, priority, time range, PID, and more. Mastering journalctl allows administrators to diagnose service failures, track kernel events, and export […]
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