Storage Disk

How to Use IBM Security QRadar with AIX on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Use IBM Security QRadar with AIX 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 ibm security qradar with aix on ibm aix […]

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How to Set Up Dovecot IMAP Server on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Set Up Dovecot IMAP Server on Debian 9

Introduction How to Set Up Dovecot IMAP Server on Debian 9 is a fundamental operation for any administrator maintaining a Debian 9 Stretch server. Debian 9 Stretch ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian […]

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Common Problems 115101

RHEL 8 multipathd Path Flapping Producing Intermittent IO Delays

🟡 Medium   ⏱ 5–30 min  Last verified: 17 February 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 Use instfix to Check Installed Fixes on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Use instfix to Check Installed Fixes 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 instfix to check installed fixes on ibm aix […]

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How to Enable AppArmor on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Enable AppArmor on Debian 9

Introduction Deploying enable apparmor 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 throughout. Prerequisites Before you begin, ensure […]

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How to Analyze System Errors with diag on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Analyze System Errors with diag 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 analyze system errors with diag on ibm aix 7.2 […]

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How to Set Up Device Guard on Windows Server 2019 — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Set Up Device Guard on Windows Server 2019

Introduction to Device Guard Device Guard is a set of hardware and software security features in Windows Server 2019 that locks down a device to run only trusted applications and drivers. It consists of two main components: Virtualization-Based Code Integrity (HVCI, also called Memory Integrity), which uses Hyper-V to protect the kernel from unsigned or […]

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Common Problems 118959

Ubuntu 14.04 LTS – root filesystem full causes service outages

🔴 Critical   ⏱ 5–30 min  Last verified: 15 February 2021 Affected versions: Ubuntu 14.04 LTS Ubuntu 14.04 Ubuntu 14.04.6 📖 ~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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Common Problems 115495

RHEL 7 MariaDB service Fails After Unclean Shutdown

🟠 High   ⏱ 5–30 min  Last verified: 15 February 2021 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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How to Use Amanda for Enterprise Backup on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Use Amanda for Enterprise Backup on Oracle Linux 8

Introduction Setting up use amanda for enterprise backup 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 Use Amanda for Enterprise Backup on Oracle Linux 8, with all the commands you need, the SELinux and firewalld […]

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