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How to Restore from mksysb Backup on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Restore from mksysb Backup 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 restore from mksysb backup on ibm aix 7.1 on […]

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How to Configure Nginx as a Reverse Proxy for Apache2 on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure Nginx as a Reverse Proxy for Apache2 on Debian 9

Introduction Deploying configure nginx as a reverse proxy for apache2 on debian 9 on a Debian 9 Stretch machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path […]

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How to Install and Configure OpenLiteSpeed Web Server on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Install and Configure OpenLiteSpeed Web Server on RHEL 8

OpenLiteSpeed is the open-source edition of LiteSpeed Web Server and delivers significantly higher PHP throughput than Apache or standard Nginx for WordPress and other PHP-heavy applications. Unlike traditional web servers, OpenLiteSpeed uses its own event-driven architecture and a tight integration with the LSPHP interpreter to handle thousands of concurrent connections with minimal RAM. On RHEL […]

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How to Set Up Snort IDS on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up Snort IDS on Oracle Linux 8

Introduction How to Set Up Snort IDS 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 configuration […]

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How to Configure OpenSCAP Security Compliance on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure OpenSCAP Security Compliance on Oracle Linux 8

Introduction This tutorial demonstrates how to Configure OpenSCAP Security Compliance on Oracle Linux 8 on Oracle Linux 8. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered Oracle Linux 8 system with the […]

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Common Problems 119061

Ubuntu 14.04 LTS sudo fails due to unresolved hostname

🟢 Low   ⏱ 5–30 min  Last verified: 18 September 2020 Affected versions: 14.04 📖 ~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 […]

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Ubuntu 14.04 — libpam-krb5 — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 14.04

Ubuntu 14.04 — libpam-krb5 — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 18 September 2020 Affected versions: Ubuntu 14.04 (trusty) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4314-1 Related CVEs: CVE-2020-10595 Upstream summary: Russ Allbery discovered that pam-krb5 incorrectly handled some responses. An attacker could possibly use this issue to execute arbitrary code. Table of contents Symptom […]

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How to Configure Multipath I/O on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure Multipath I/O on Oracle Linux 8

Introduction How to Configure Multipath I/O 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 configuration is […]

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Common Problems 125043

Oracle Linux 8 – Common Problem 008 – Diagnosis and Fix

🟠 High   ⏱ 5–30 min  Last verified: 17 September 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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How to Configure OpenTelemetry Collector on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure OpenTelemetry Collector on Debian 10

Introduction Debian 10 Buster is built around the ethos of stability and free software. Setting up configure opentelemetry collector on debian 10 on Buster leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Buster freeze. Follow each step carefully and the […]

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