ubuntu

Common Problems 117538

Ubuntu 20.04 LTS – DNS resolution fails with Temporary failure in name resolution

🟠 High   ⏱ 5–30 min  Last verified: 20 May 2023 Affected versions: Ubuntu 20.04 LTS Ubuntu 20.04 Ubuntu 20.04.6 📖 ~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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Common Problems 117484

Ubuntu 20.04 LTS Failed to Fetch Packages from Mirror

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2023 📖 ~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 117476

Ubuntu 20.04 Bluetooth Not Discovering Devices

🟡 Medium   ⏱ 5–30 min  Last verified: 18 May 2023 📖 ~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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Ubuntu 16.04 — docker-registry — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — docker-registry — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 17 May 2023 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6336-1 Related CVEs: CVE-2017-11468 CVE-2023-2253 Upstream summary: It was discovered that Docker Registry incorrectly handled certain crafted input, A remote attacker could possibly use this issue to cause a denial […]

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Ubuntu 22.04 — sosreport — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — sosreport — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 17 May 2023 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5636-1 Related CVEs: CVE-2022-2806 Upstream summary: It was discovered that SoS incorrectly handled certain data. An attacker could possibly use this issue to expose sensitive information. Table of contents Symptom […]

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Como Configurar um Firewall com o UFW no Ubuntu 20.04 — step-by-step Linux tutorial on Progressive Robot

Como Configurar um Firewall com o UFW no Ubuntu 20.04

O UFW, ou Uncomplicated Firewall, é uma interface de gerenciamento simplificado de firewall que esconde a complexidade das tecnologias de filtragem de pacotes de baixo nível, como iptables e nftables. Se você deseja começar a proteger sua rede, mas não tem certeza sobre qual…

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Ubuntu 18.04 — node-hawk — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — node-hawk — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 May 2023 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6116-1 Related CVEs: CVE-2022-29167 Upstream summary: It was discovered that hawk incorrectly handled certain inputs. If a user or an automated system were tricked into opening a specially crafted input […]

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