Performance

How to Set Up Amanda Backup on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Set Up Amanda Backup 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 set up amanda backup 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 115399

RHEL 7 systemctl unit failure caused by invalid drop-in override

🟠 High   ⏱ 5–30 min  Last verified: 10 September 2021 Affected versions: RHEL 7 📖 ~2 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 on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Install Nginx on RHEL 8

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 […]

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How to Secure MySQL on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Secure MySQL 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 secure mysql 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 distribution. This […]

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How to Configure Ruby via AIX Toolbox on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Configure Ruby via AIX Toolbox on IBM AIX 7.2

Introduction IBM AIX 7.2 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.2 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to configure ruby via aix toolbox on ibm aix 7.2 […]

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How to Configure Nginx WebSocket Proxying on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Configure Nginx WebSocket Proxying 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 configure nginx websocket proxying 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 118546

Ubuntu 16.04 LTS – OOM killer terminates critical services

🔴 Critical   ⏱ 5–30 min  Last verified: 6 September 2021 Affected versions: Ubuntu 16.04 LTS Ubuntu 16.04 Ubuntu 16.04.7 📖 ~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 […]

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How to Configure Nginx as a TCP/UDP Load Balancer on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Configure Nginx as a TCP/UDP Load Balancer 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 configure nginx as a tcp/udp load balancer 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 […]

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Common Problems 112517

Windows Server 2019 – SMB Direct RDMA driver mismatch causes connection fallback – Fix and Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 4 September 2021 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 Harden Nginx: Security Headers, TLS 1.3 and OCSP Stapling on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Harden Nginx: Security Headers, TLS 1.3 and OCSP Stapling on RHEL 7

How to Harden Nginx: Security Headers, TLS 1.3 and OCSP Stapling on RHEL 7 A default Nginx installation exposes unnecessary information about the server software, accepts outdated and broken TLS protocol versions, and omits the HTTP security headers that modern browsers rely on for protection against cross-site scripting, clickjacking, and protocol downgrade attacks. Hardening Nginx […]

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