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Common Problems 124123

Oracle Linux 10 – CIFS mount fails after Kerberos library update – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 7 March 2026 Affected versions: Oracle Linux 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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How to Capture Packets with tcpdump on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Capture Packets with tcpdump on RHEL 10

Introduction This tutorial demonstrates how to Capture Packets with tcpdump on RHEL 10 on RHEL 10. 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 RHEL 10 system with the default AppStream repositories […]

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Common Problems 114076

RHEL 10 XFS Metadata Errors After Unexpected Power Loss

🔴 Critical   ⏱ 5–30 min  Last verified: 5 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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Fedora 42 — krb5 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Fedora 42

Fedora 42 — krb5 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Fedora 42 📖 ~4 min read  •  Source: Fedora update FEDORA-2026-6c99aaa6d3 Related CVEs: CVE-2026-40355 CVE-2026-40356 Upstream summary: – Fix NegoEx parsing vulnerabilities (CVE-2026-40355, CVE-2026-40356) Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – […]

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Common Problems 113958

RHEL 10 Chronyd Time Drift Causes Kerberos Authentication Failures

🔴 Critical   ⏱ 5–30 min  Last verified: 4 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 114056

RHEL 10 Multipath Device Names Change After Reboot

🟠 High   ⏱ 5–30 min  Last verified: 4 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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Common Problems 113943

RHEL 10 – dnf cannot download metadata due to mirror TLS validation errors – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 3 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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How to Set Up Software RAID with mdadm on Oracle Linux 10 — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Set Up Software RAID with mdadm on Oracle Linux 10

Introduction Oracle Linux 10 ships with a stable, security-hardened base that makes deploying set up software raid with mdadm on oracle linux 10 both straightforward and auditable. This tutorial covers the complete procedure for how to Set Up Software RAID with mdadm on Oracle Linux 10, including dnf module streams where applicable, systemd unit management, […]

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Oracle Linux 8 — krb5 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — krb5 — vulnerability — patch and remediation guide (ELSA-2026-16799)

🟠 High   ⏱ 15–60 min  Last verified: 2 March 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2026-16799 Related CVEs: CVE-2026-40355 CVE-2026-40356 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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How to Create Databases and Users in MariaDB on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Create Databases and Users in MariaDB on RHEL 10

Introduction RHEL 10 ships with a stable, security-hardened base that makes deploying create databases and users in mariadb both straightforward and auditable. This tutorial covers the complete procedure for how to Create Databases and Users in MariaDB on RHEL 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for […]

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