Firewall

How to Use IBM Spectrum LSF on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Use IBM Spectrum LSF on IBM AIX 7.1

Introduction IBM AIX 7.1 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 7.1 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to use ibm spectrum lsf on ibm aix 7.1 on […]

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How to Use xlC C/C++ Compiler on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Use xlC C/C++ Compiler 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 use xlc c/c++ compiler on ibm aix 7.2 on […]

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How to Install FastAPI on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Install FastAPI on Oracle Linux 8

Introduction Setting up install fastapi on oracle linux 8 on a Oracle Linux 8 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Install FastAPI on Oracle Linux 8, with all the commands you need, the SELinux and firewalld considerations to keep in mind, and […]

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How to Install PostgreSQL on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Install PostgreSQL on RHEL 8

PostgreSQL is a powerful, standards-compliant open-source relational database known for its extensibility, advanced data types, and strict ACID compliance. RHEL 8’s AppStream makes multiple PostgreSQL major versions available as installable modules, so you can target a specific release without managing external repositories. This guide demonstrates installing PostgreSQL 13 via the AppStream module system, initialising the […]

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Common Problems 125134

Oracle Linux 8 – Common Problem 017 – Diagnosis and Fix

🟢 Low   ⏱ 5–30 min  Last verified: 9 December 2020 Affected versions: Oracle Linux 8 📖 ~3 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 121498

NTP Drift Breaking TLS and Scheduled Jobs

🟠 High   ⏱ 5–30 min  Last verified: 9 December 2020 Affected versions: Debian 9 📖 ~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 Configure Kernel Parameters with sysctl on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure Kernel Parameters with sysctl on Oracle Linux 8

Introduction How to Configure Kernel Parameters with sysctl on Oracle Linux 8 on Oracle Linux 8 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting […]

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How to Configure an iSCSI Target on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Configure an iSCSI Target on Windows Server 2016

How to Configure Windows Server 2016 iSCSI Target iSCSI (Internet Small Computer Systems Interface) allows servers to present block storage over a standard TCP/IP network, enabling shared storage for Hyper-V clusters, file servers, and other workloads without expensive dedicated SAN hardware. Windows Server 2016 includes a built-in iSCSI Target Server role that allows any server […]

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Common Problems 117621

Ubuntu 20.04 LTS – Certbot renewal fails because port 80 is in use – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 8 December 2020 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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Common Problems 115038

RHEL 8 tuned Profile Causes Unexpected CPU Throttling

🟡 Medium   ⏱ 5–30 min  Last verified: 8 December 2020 📖 ~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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