DNS

pr cp 115113 r2

RHEL 8 Postfix cannot send mail due to firewall and SELinux policy

๐ŸŸก Medium   โฑ 5โ€“30 min  Last verified: 20 May 2026 ๐Ÿ“– ~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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pr cp 125687 r2

SLES 16 – Common Problem 248 – Diagnosis and Fix

๐ŸŸ  High   โฑ 5โ€“30 min  Last verified: 20 May 2026 Affected versions: SUSE Linux Enterprise Server 16 ๐Ÿ“– ~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 […]

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pr cp 126193 r2

SLES 15 – Common Problem 248 – Diagnosis and Fix

๐ŸŸ  High   โฑ 5โ€“30 min  Last verified: 20 May 2026 Affected versions: SUSE Linux Enterprise Server 15 ๐Ÿ“– ~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 […]

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pr cp 119140 r2

Ubuntu 14.04 LTS LDAP Authentication Failures from NSS Cache Staleness

๐ŸŸ  High   โฑ 5โ€“30 min  Last verified: 20 May 2026 Affected versions: 14.04 LTS ๐Ÿ“– ~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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pr cp 117612 r2

Ubuntu 20.04 LTS NIC Missing After Kernel Module Update

๐ŸŸ  High   โฑ 5โ€“30 min  Last verified: 20 May 2026 Affected versions: 20.04 LTS ๐Ÿ“– ~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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pr cp 120169 r2

Debian 12 – PostgreSQL service fails after package upgrade – Fix & Prevention

๐ŸŸ  High   โฑ 5โ€“30 min  Last verified: 20 May 2026 Affected versions: Debian 12 ๐Ÿ“– ~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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pr cp 116112 r2

Ubuntu 26.04 LTS – CIFS mount fails with permission denied at boot – Fix & Prevention

๐ŸŸ  High   โฑ 5โ€“30 min  Last verified: 20 May 2026 Affected versions: Ubuntu 26.04 LTS ๐Ÿ“– ~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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pr cp 128189 r2

IBM AIX 7.3 – Common Problem 248 – Diagnosis and Fix

๐ŸŸก Medium   โฑ 5โ€“30 min  Last verified: 20 May 2026 Affected versions: IBM AIX 7.3 ๐Ÿ“– ~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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pr cp 122685 r2

FreeBSD 14 – Batch 10 Problem 248 – Fix & Prevention

๐Ÿ”ด Critical   โฑ 5โ€“30 min  Last verified: 20 May 2026 Affected versions: FreeBSD 14 ๐Ÿ“– ~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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pr cp 124157 r2

Oracle Linux 10 – rsyslog not forwarding logs over TLS to SIEM – Fix & Prevention

๐ŸŸ  High   โฑ 5โ€“30 min  Last verified: 20 May 2026 Affected versions: Oracle Linux 10 ๐Ÿ“– ~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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