DNS

Common Problems 113497

Windows Server 2012 R2 — WSUS metadata corruption prevents clients from downloading approved updates — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 18 October 2019 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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How to Set Up LVM Logical Volume Management on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Set Up LVM Logical Volume Management on Debian 9

Introduction How to Set Up LVM Logical Volume Management 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 […]

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How to Configure Network Bridging on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure Network Bridging on Debian 9

Introduction How to Configure Network Bridging 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 9. This […]

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FreeBSD 12 — p5-Net-DNS — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — p5-Net-DNS — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 17 October 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: p5-Net-DNS — multiple Vulnerabilities Related CVEs: CVE-2007-3377 CVE-2007-3409 Upstream summary: A Secunia Advisory reports: An error exists in the handling of DNS queries where IDs are incremented with a fixed […]

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How to Configure PostgreSQL Point-in-Time Recovery on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure PostgreSQL Point-in-Time Recovery on Debian 9

Introduction This guide explains how to Configure PostgreSQL Point-in-Time Recovery on Debian 9 on Debian 9 Stretch. Debian Stretch uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 9 install with the […]

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Common Problems 118532

Ubuntu 16.04 mdadm RAID Degraded After Reboot

🟡 Medium   ⏱ 5–30 min  Last verified: 16 October 2019 📖 ~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 115084

Leapp Preupgrade Reports Blockers for RHEL 8 Minor Upgrade Path

🟡 Medium   ⏱ 5–30 min  Last verified: 16 October 2019 📖 ~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 114895

DNF Metadata Expired Causing Slow or Failed Updates

🟡 Medium   ⏱ 5–30 min  Last verified: 16 October 2019 📖 ~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 Set Up a Highly Available Web Stack with Keepalived on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Set Up a Highly Available Web Stack with Keepalived on RHEL 7

How to Set Up a Highly Available Web Stack with Keepalived on RHEL 7 High availability eliminates single points of failure by ensuring that if one server goes down, another takes over seamlessly. For web servers, one of the most common HA patterns is a Virtual IP (VIP) address that floats between two or more […]

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How to Set Up iSCSI Target Server on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Set Up iSCSI Target Server on Windows Server 2012 R2

How to Set Up iSCSI Target Server on Windows Server 2012 R2 iSCSI (Internet Small Computer Systems Interface) is a storage networking protocol that enables block-level storage access over a standard TCP/IP network. Windows Server 2012 R2 includes a built-in iSCSI Target Server role service that allows you to create and manage iSCSI targets — […]

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