chris

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 SLES 12 in Azure — step-by-step SUSE Linux Enterprise 12 tutorial on Progressive Robot

How to Configure SLES 12 in Azure

Introduction This tutorial covers How to Configure SLES 12 in Azure on SLES 12. SLES 12 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Prerequisites Ensure your SLES 12 system is up to date: zypper refresh && […]

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Common Problems 113432

Windows Server 2012 R2 Disk Queue Length Sustained Above Threshold on VM Hosts – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 18 September 2020 Affected versions: Windows Server 2012 R2 📖 ~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 […]

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Common Problems 113394

Windows Server 2012 R2 — DNS Server service intermittently stops responding after cumulative update on Windows Server 2012 R2 — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 18 September 2020 Affected versions: Windows Server 2012 R2 📖 ~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 […]

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Common Problems 112573

Windows Server 2019 — NLB multicast mode conflicts with upstream switch ARP handling and causes packet loss — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 18 September 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 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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