DNS

How to Set Up a Private Docker Registry on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Set Up a Private Docker Registry on Debian 11

Introduction How to Set Up a Private Docker Registry on Debian 11 is a fundamental operation for any administrator maintaining a Debian 11 Bullseye server. Debian 11 Bullseye ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from […]

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Common Problems 121519

Debian 9 Temporary Failure Resolving During apt update

🟡 Medium   ⏱ 5–30 min  Last verified: 13 October 2022 Affected versions: Debian 9 📖 ~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 120649

Debian 11 OpenSSL Version Mismatch Breaks App Startup

🟠 High   ⏱ 5–30 min  Last verified: 13 October 2022 Affected versions: Debian 11 📖 ~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 13 — p5-Net-DNS — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — p5-Net-DNS — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 13 October 2022 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: p5-Net-DNS — multiple Vulnerabilities Related CVEs: CVE-2007-3377 CVE-2007-3409 Upstream summary: A Secunia Advisory reports: An error exists in the handling of DNS queries where IDs are incremented with a fixed […]

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Common Problems 117989

Ubuntu 18.04 LTS Package Dependency Errors After Partial Upgrade

🟠 High   ⏱ 5–30 min  Last verified: 13 October 2022 Affected versions: 18.04 LTS 📖 ~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 116945

Ubuntu 22.04 LTS – SSH key login fails due to ~/.ssh permissions – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 13 October 2022 Affected versions: Ubuntu 22.04 LTS 📖 ~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 Nagios4 on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Set Up Nagios4 on Debian 11

Introduction Debian 11 Bullseye is built around the ethos of stability and free software. Setting up set up nagios4 on debian 11 on Bullseye leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Bullseye freeze. Follow each step carefully and the […]

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Common Problems 120684

Debian 11: Nginx serves incomplete TLS certificate chain

🟠 High   ⏱ 5–30 min  Last verified: 12 October 2022 Affected versions: Debian 11 📖 ~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 117073

Ubuntu 22.04 LTS – MySQL fails to start because AppArmor blocks data path – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 12 October 2022 Affected versions: Ubuntu 22.04 LTS 📖 ~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 115438

RHEL 7 journalctl Missing Historical Logs After Rotation

🟡 Medium   ⏱ 5–30 min  Last verified: 12 October 2022 📖 ~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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