Networking

Common Problems 113066

Windows Server 2016 TempDB on System Volume Causing Server-Wide Disk Contention – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 11 October 2020 Affected versions: Windows Server 2016 📖 ~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 112443

Windows Server 2019 — DHCP failover partnership enters communication interrupted state and lease replication stalls — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 11 October 2020 Affected versions: Windows Server 2019 📖 ~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 Configure Caddy Web Server on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure Caddy Web Server on Oracle Linux 8

Introduction This tutorial demonstrates how to Configure Caddy Web Server 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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How to Install Zabbix Server on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install Zabbix Server on Debian 9

Introduction Deploying install zabbix server 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 Ensure Debian 9 […]

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How to Configure Corosync on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure Corosync on Oracle Linux 8

Introduction How to Configure Corosync 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 reproducible […]

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How to Install and Configure AIDE on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install and Configure AIDE on RHEL 7

How to Install and Configure AIDE on RHEL 7 AIDE (Advanced Intrusion Detection Environment) is a host-based intrusion detection system (HIDS) that works by taking a cryptographic snapshot of your filesystem at a known-good point in time and then comparing the current state of the filesystem against that baseline to identify any files that have […]

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Common Problems 118078

Ubuntu 18.04 LTS – AppArmor profile denial breaks custom application startup – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 9 October 2020 Affected versions: Ubuntu 18.04 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 115124

firewalld Rich Rule Works in Runtime but Lost After Reboot

🟡 Medium   ⏱ 5–30 min  Last verified: 9 October 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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How to Configure Windows Server 2012 R2 with PowerShell — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Configure Windows Server 2012 R2 with PowerShell

Introduction PowerShell 4.0, which ships with Windows Server 2012 R2, brings Desired State Configuration (DSC), enhanced debugging, and improved workflows to Windows administration. Performing initial configuration through PowerShell rather than the GUI creates repeatable, auditable, and scriptable setup procedures that work consistently across all servers. This guide covers every initial configuration task using PowerShell 4.0 […]

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How to Set Up Oracle Linux 8 Cluster with Oracle Grid Infrastructure — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up Oracle Linux 8 Cluster with Oracle Grid Infrastructure

Introduction This tutorial demonstrates how to Set Up Oracle Linux 8 Cluster with Oracle Grid Infrastructure 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 […]

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