web server

How to Configure IIS SSL/TLS on Windows Server 2019 — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Configure IIS SSL/TLS on Windows Server 2019

Introduction to IIS SSL/TLS Configuration on Windows Server 2019 Internet Information Services (IIS) 10 on Windows Server 2019 supports TLS 1.0 through TLS 1.3, with TLS 1.3 enabled by default when running on Windows Server 2019 version 1903 or later. Configuring SSL/TLS correctly on IIS means obtaining and binding a valid certificate, disabling outdated protocol […]

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How to Install Portainer for Docker Management on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Install Portainer for Docker Management on RHEL 9

Portainer is a lightweight, web-based Docker management UI that makes container management accessible without needing the Docker CLI. It provides a graphical interface for managing containers, images, volumes, networks, Docker Compose stacks, and container registries. Portainer Community Edition (CE) is open-source and supports Docker standalone, Docker Swarm, and Kubernetes environments. It is particularly valuable for […]

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Common Problems 115539

RHEL 7 Apache httpd will not start due to address already in use

🟠 High   ⏱ 5–30 min  Last verified: 28 June 2022 Affected versions: RHEL 7 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & […]

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Common Problems 112412

Windows Server 2019 – Kerberos KRB_AP_ERR_MODIFIED and SPN duplication – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 23 June 2022 Affected versions: Windows Server 2019 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors […]

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How to Enable Brotli Compression in Nginx on SLES 15 — step-by-step SUSE Linux Enterprise 15 tutorial on Progressive Robot

How to Enable Brotli Compression in Nginx on SLES 15

Introduction This tutorial covers How to Enable Brotli Compression in Nginx on SLES 15 on SLES 15. SLES 15 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Prerequisites Ensure your SLES 15 system is up to date: […]

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How to Install PHP 8.3 on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Install PHP 8.3 on RHEL 9

PHP is the dominant server-side scripting language powering WordPress, Laravel, Drupal, Magento, and thousands of other web applications. RHEL 9 ships with PHP 8.1 by default, but the Remi repository provides the latest PHP releases including PHP 8.3. PHP 8.3 introduced typed class constants, new json_validate() function, and further performance improvements over PHP 8.2. The […]

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How to Configure Nginx Upstream Caching on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure Nginx Upstream Caching on Debian 9

Introduction Debian 9 Stretch is built around the ethos of stability and free software. Setting up configure nginx upstream caching on debian 9 on Stretch leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Stretch freeze. Follow each step carefully and […]

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How to Install Laravel 11 with Nginx on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Install Laravel 11 with Nginx on RHEL 9

Laravel is the most popular PHP web application framework, providing an expressive, MVC-based structure with built-in features including Eloquent ORM, Blade templating, database migrations, queues, events, broadcasting, and the Artisan CLI. Laravel follows convention-over-configuration to reduce boilerplate and accelerates development with scaffolding tools like Breeze (authentication starter kit) and Jetstream. This guide covers creating a […]

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How to Install Nginx on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install Nginx on RHEL 7

How to Install Nginx on RHEL 7 Nginx is a high-performance, open-source web server and reverse proxy known for its speed, stability, and low memory footprint. On Red Hat Enterprise Linux 7, Nginx is not available in the default repositories, so you must either enable the EPEL (Extra Packages for Enterprise Linux) repository or configure […]

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How to Configure SELinux on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Configure SELinux on RHEL 9

SELinux (Security-Enhanced Linux) is a mandatory access control (MAC) framework built into the Linux kernel, developed by the NSA and now maintained as a core part of RHEL. Unlike traditional discretionary access control (DAC) where file permissions determine access, SELinux enforces policies that confine every process to the minimum resources it legitimately needs — even […]

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