Capacity Planning

Common Problems 118091

Ubuntu 18.04 Nginx 502 Bad Gateway with PHP-FPM

🟡 Medium   ⏱ 5–30 min  Last verified: 8 August 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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Common Problems 112949

Windows Server 2016 – Storage Replica initial sync never completes – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 8 August 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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How to Set Up Uptime Monitoring with PRTG on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Set Up Uptime Monitoring with PRTG on Windows Server 2012 R2

How to Set Up Uptime Monitoring with PRTG on Windows Server 2012 R2 PRTG Network Monitor by Paessler is a widely deployed network and infrastructure monitoring platform that provides comprehensive uptime monitoring, performance metrics, and alerting for Windows Server 2012 R2 environments. PRTG uses a combination of ping checks, WMI queries, SNMP polling, and the […]

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How to Configure Remote Desktop Session Host on Windows Server 2019 — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Configure Remote Desktop Session Host on Windows Server 2019

How to Configure Remote Desktop Session Host on Windows Server 2019 Remote Desktop Session Host (RDSH) is the core component of a Windows Server 2019 Remote Desktop Services deployment that allows multiple users to connect simultaneously and run shared applications or full desktops in isolated sessions. Each user gets a private session with their own […]

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Common Problems 115062

RHEL 8 tuned Profile Not Applied After Reboot

🟡 Medium   ⏱ 5–30 min  Last verified: 5 August 2020 Affected versions: 8.5 8.6 8.7 8.8 8.9 8.10 📖 ~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 118427

Ubuntu 16.04 LTS /var partition full causing service failures

🟡 Medium   ⏱ 5–30 min  Last verified: 4 August 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 Manage System Packages with dnf on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Manage System Packages with dnf on RHEL 8

DNF (Dandified YUM) is the default package manager on RHEL 8, replacing the older yum command with improved dependency resolution, transaction history, and modular package support through AppStream. Whether you are installing software, managing module streams, or adding third-party repositories like EPEL, dnf is the single tool for the job. This tutorial covers daily package […]

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Common Problems 121060

Debian 10 – systemd Journal Consumes Disk Space – Retention and Vacuum Strategy

🟡 Medium   ⏱ 5–30 min  Last verified: 1 August 2020 Affected versions: Debian 10 📖 ~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 115104

kdump Not Capturing Kernel Crash Dumps

🟡 Medium   ⏱ 5–30 min  Last verified: 27 July 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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Common Problems 119077

Ubuntu 14.04 LTS – high CPU from kswapd due memory pressure

🟠 High   ⏱ 5–30 min  Last verified: 24 July 2020 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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