Debian 9

pr cp 121558 r2

DNS Resolution Intermittently Fails on Server

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Debian 9 πŸ“– ~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 121548 r2

Cron Jobs Not Running Due to Environment Path Issues

🟑 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Debian 9 πŸ“– ~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 121538 r2

TLS Handshake Errors From Outdated CA Certificates

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Debian 9 πŸ“– ~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 121528 r2

MySQL Service Refuses to Start After Crash Recovery

πŸ”΄ Critical   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Debian 9 πŸ“– ~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 121518 r2

Kernel Panic After Unattended Upgrade

πŸ”΄ Critical   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Debian 9 πŸ“– ~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 121508 r2

Systemd Service Fails on Boot Due to Dependency Order

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Debian 9 πŸ“– ~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 121498 r2

NTP Drift Breaking TLS and Scheduled Jobs

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Debian 9 πŸ“– ~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 121488 r2

SSH Access Denied After Security Hardening Changes

πŸ”΄ Critical   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Debian 9 πŸ“– ~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 121478 r2

Disk Full in /var Causing Service Outages

πŸ”΄ Critical   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Debian 9 πŸ“– ~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 121468 r2

APT Update Fails With 404 Repository Errors on Debian 9

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Debian 9 πŸ“– ~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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