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How to Configure SSL/TLS with OpenSSL and Self-Signed Certificates on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Configure SSL/TLS with OpenSSL and Self-Signed Certificates on RHEL 7

How to Configure SSL/TLS with OpenSSL and Self-Signed Certificates on RHEL 7 Encrypting web traffic with SSL/TLS is no longer optional for any server that handles user data, logins, or forms. Even on internal or development servers, a self-signed certificate provides encryption in transit and is far preferable to plain HTTP. On RHEL 7, OpenSSL […]

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Common Problems 117611

Ubuntu 20.04 LTS – PHP-FPM pool crashes under load with memory limit issues – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 7 July 2021 Affected versions: Ubuntu 20.04 LTS 📖 ~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 Install Nginx Ingress Controller on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Install Nginx Ingress Controller on FreeBSD 13

Introduction FreeBSD 13 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up install nginx ingress controller on freebsd 13 on FreeBSD 13 follows the rc.conf/service(8) paradigm rather than systemd, which means enabling a service and configuring its startup options are done differently from any Linux […]

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Common Problems 119027

Apache2 Fails to Start Because Port 80 Is Already in Use on Ubuntu 14.04

🟡 Medium   ⏱ 5–30 min  Last verified: 3 July 2021 📖 ~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 & Cross-Refs References & Further […]

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How to Configure Performance Counter Alerts on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Configure Performance Counter Alerts on Windows Server 2012 R2

How to Configure MMC Snap-ins on Windows Server 2012 R2 Microsoft Management Console (MMC) is the host application for virtually all Windows Server 2012 R2 administrative tools. Individual management capabilities are delivered as MMC snap-ins — Active Directory Users and Computers, DNS Manager, DHCP Manager, Group Policy Management, Certificate Manager, Computer Management, and dozens of […]

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How to Configure Kubernetes on Windows Server 2019 — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Configure Kubernetes on Windows Server 2019

Introduction to Kubernetes on Windows Server 2019 Kubernetes is the industry-standard container orchestration platform that automates deployment, scaling, and management of containerized applications. Windows Server 2019 can participate in Kubernetes clusters as a worker node, running Windows containers alongside Linux-based control plane components. As of Kubernetes 1.14 and later, Windows worker nodes are officially supported, […]

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How to Install and Configure Nagios Core on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Install and Configure Nagios Core on RHEL 8

Nagios Core is one of the most widely-deployed open-source IT infrastructure monitoring systems in the world, providing alerting and status dashboards for hosts, services, and network devices. On RHEL 8, installing Nagios Core from source gives you the latest release and full control over the build configuration. This tutorial walks through every step from prerequisite […]

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How to Set Up ModSecurity WAF with Apache on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Set Up ModSecurity WAF with Apache on FreeBSD 13

Introduction This guide explains how to Set Up ModSecurity WAF with Apache on FreeBSD 13 on FreeBSD 13. FreeBSD uses the pkg(8) binary package manager, rc.conf(5) for service startup configuration, and pf(4) as its primary packet filter. There is no SELinux or AppArmor — instead, FreeBSD provides the MAC (Mandatory Access Control) framework and Capsicum […]

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How to Configure Volume Shadow Copy Service (VSS) on Windows Server 2019 — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Configure Volume Shadow Copy Service (VSS) on Windows Server 2019

Introduction to Volume Shadow Copy Service on Windows Server 2019 The Volume Shadow Copy Service (VSS) is a core Windows infrastructure component that enables the creation of consistent point-in-time snapshots of volumes, even while applications are actively writing to disk. VSS coordinates with VSS requestors (backup applications), VSS providers (storage drivers or hardware), and VSS […]

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How to Enable HTTP/2 in Nginx on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Enable HTTP/2 in Nginx on FreeBSD 13

Introduction Deploying enable http/2 in nginx on freebsd 13 on a FreeBSD 13 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the standard […]

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