Dhcp

pr cp 121517 r2

Debian 9 – Common Problem 081 – Fix & Prevention

🟑 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 119467 r2

Debian 13 – NetworkManager device stuck unmanaged after interface changes – Fix & Prevention

🟑 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Debian 13 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 118971 r2

Ubuntu 14.04 LTS DNS resolution fails while IP ping works

🟑 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: 14.04 LTS 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 115947 r2

Ubuntu 26.04 LTS – systemd-resolved DNS lookup intermittently fails – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Ubuntu 26.04 LTS 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 119457 r2

Debian 13 – systemd-resolved DNS failures cause intermittent name resolution – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Debian 13 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 114922 r2

RHEL 8 NetworkManager Service Fails to Start at Boot

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: 8.5 8.6 8.7 8.8 8.9 8.10 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 & […]

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pr cp 115125 r2

RHEL 8 DNS Settings Overwritten by DHCP and Break Internal Name Resolution

🟑 Medium   ⏱ 5–30 min  Last verified: 20 May 2026 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 & Cross-Refs References & Further […]

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pr cp 118118 r2

Ubuntu 18.04 Hostname Mismatch Breaks sudo and Mail Alerts

🟑 Medium   ⏱ 5–30 min  Last verified: 20 May 2026 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 & Cross-Refs References & Further […]

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pr cp 121687 r2

Debian 9 – Missing firmware prevents NIC initialization – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 20 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 114091 r2

RHEL 10 – nmcli DNS settings not applied due to resolver override conflicts – Fix & Prevention

🟑 Medium   ⏱ 5–30 min  Last verified: 20 May 2026 Affected versions: RHEL 10 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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