Ubuntu 22.04

Common Problems 117121

Ubuntu 22.04 LTS – Secure Boot blocks unsigned DKMS module loading – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 15 August 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 117095

Ubuntu 22.04 LTS – Certbot renewal fails due to broken challenge path – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 14 August 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 117064

Ubuntu 22.04 LTS Time Drift Because NTP Sync Is Inactive

🟡 Medium   ⏱ 5–30 min  Last verified: 13 August 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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Common Problems 116995

Ubuntu 22.04 LTS – Time drift breaks TLS and package validation – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 12 August 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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Ubuntu 22.04 — libphp-phpmailer — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — libphp-phpmailer — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 10 August 2022 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5956-1 Related CVEs: CVE-2016-10033 CVE-2016-10045 CVE-2017-11503 CVE-2017-5223 CVE-2018-19296 CVE-2020-13625 CVE-2021-3603 Upstream summary: Dawid Golunski discovered that PHPMailer was not properly escaping user input data used as arguments to functions executed […]

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How to Create a CLI with Python Fire on Ubuntu 22.04 — step-by-step Linux tutorial on Progressive Robot

How to Create a CLI with Python Fire on Ubuntu 22.04

Python Fire is a Python library that lets you automatically CLIs (command line interfaces) from Python objects. CLIs are programs that take text input from the command line, and can be helpful to your workflow of developing and debugging. This can be useful for those more comfortable in Bash and a command line.

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Common Problems 117014

Ubuntu 22.04 LTS SSH Service Fails After Host Key Permission Change

🟡 Medium   ⏱ 5–30 min  Last verified: 9 August 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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Common Problems 116979

Ubuntu 22.04 LTS – systemd service fails at boot with unit start-limit-hit

🟠 High   ⏱ 5–30 min  Last verified: 8 August 2022 Affected versions: Ubuntu 22.04 LTS Ubuntu 22.04 Ubuntu 22.04.4 📖 ~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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Ubuntu 22.04 — pdfresurrect — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — pdfresurrect — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 7 August 2022 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5282-1 Related CVEs: CVE-2019-14267 CVE-2019-14934 CVE-2020-20740 CVE-2020-9549 CVE-2021-3508 Upstream summary: It was discovered that PDFResurrect was incorrectly handling corrupted PDF files. An attacker could possibly use this issue to cause […]

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Common Problems 116973

Ubuntu 22.04 LTS – NVIDIA driver fails under Secure Boot module signing – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 7 August 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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