DNS

Common Problems 114017

RHEL 10 – subscription-manager reports system not entitled after VM clone – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 2 April 2026 Affected versions: RHEL 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 113940

RHEL 10 – systemd service enters failed state after boot due to unit ordering – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 1 April 2026 Affected versions: RHEL 10.0 RHEL 10.1 📖 ~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 113950

RHEL 10 – systemctl daemon-reload required after unit drop-in but omitted – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 31 March 2026 Affected versions: RHEL 10.0 RHEL 10.1 📖 ~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 Install Alertmanager on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Install Alertmanager on RHEL 10

Introduction Setting up install alertmanager on a RHEL 10 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Install Alertmanager on RHEL 10, with all the commands you need, the SELinux and firewalld considerations to keep in mind, and how to validate the result on […]

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FreeBSD 15 — avahi-libdns — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — avahi-libdns — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 30 March 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: avahi — denial of service Related CVEs: CVE-2010-2244 CVE-2011-1002 Upstream summary: Avahi developers reports: A vulnerability has been reported in Avahi, which can be exploited by malicious people to cause […]

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How to Install and Use Fluentd for Log Aggregation on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Install and Use Fluentd for Log Aggregation on RHEL 9

Fluentd is an open-source data collector that unifies log aggregation across your infrastructure, enabling you to collect, parse, transform, and forward logs to multiple destinations from a single configuration file. Maintained by the Cloud Native Computing Foundation (CNCF), it has become the industry standard for centralized log management in cloud-native environments. The Treasure Data distribution, […]

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Common Problems 122492

pf Rules Load Error at Boot

🟠 High   ⏱ 5–30 min  Last verified: 29 March 2026 Affected versions: FreeBSD 14 📖 ~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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FreeBSD 12 — dnsdist — multiple vulnerabilities (11 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — dnsdist — multiple vulnerabilities (11 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 28 March 2026 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: DNSdist — vulnerabilities Related CVEs: CVE-2016-7069 CVE-2017-7557 CVE-2024-25581 CVE-2025-30187 CVE-2026-0396 CVE-2026-0397 CVE-2026-24028 CVE-2026-24029  +3 more Upstream summary: https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-02.html reports: CVE-2026-0396: HTML injection in the web dashboard CVE-2026-0397: Information disclosure via […]

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Common Problems 114007

RHEL 10 – multipathd fails to map SAN LUNs during boot – Fix & Prevention

🔴 Critical   ⏱ 5–30 min  Last verified: 28 March 2026 Affected versions: RHEL 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 113926

RHEL 10 Kernel Updated But Old Kernel Remains Default

🟡 Medium   ⏱ 5–30 min  Last verified: 27 March 2026 Affected versions: RHEL 10.0 RHEL 10.1 📖 ~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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