Package Management

Common Problems 117893

Failed to Fetch Repository 404 During apt update

🟡 Medium   ⏱ 5–30 min  Last verified: 22 October 2020 📖 ~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 117889

Ubuntu 18.04 Stuck on Boot Splash After Kernel Update

🟡 Medium   ⏱ 5–30 min  Last verified: 22 October 2020 📖 ~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 117393

Ubuntu 20.04 LTS – apt update fails with NO_PUBKEY for third-party repository – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 22 October 2020 Affected versions: Ubuntu 20.04 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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SLES 15 — hplip — multiple vulnerabilities (9 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — hplip — multiple vulnerabilities (9 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 22 October 2020 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-RU-2025:0270-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-6923 CVE-2010-4267 CVE-2011-2697 CVE-2013-4325 CVE-2013-6402 CVE-2013-6427 CVE-2015-0839 CVE-2004-0801  +1 more Upstream summary: The HP Linux Imaging and Printing (HPLIP) software may potentially be affected by […]

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Ubuntu 16.04 — node-bl — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — node-bl — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 21 October 2020 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5159-1 Related CVEs: CVE-2020-8244 Upstream summary: It was discovered that bl incorrectly handled certain inputs. An attacker could possibly use this issue to cause a denial of service. Table of […]

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Oracle Linux 8 — Storage Management in Cockpit Web Console Can't Be Used With Multipath Devices — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — Storage Management in Cockpit Web Console Can’t Be Used With Multipath Devices

🟠 High   ⏱ 5–30 min  Last verified: 21 October 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: Oracle Bug 36671939 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 […]

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How to Configure iSCSI Storage on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure iSCSI Storage on Oracle Linux 8

Introduction How to Configure iSCSI Storage on Oracle Linux 8 on Oracle Linux 8 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration is […]

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Ubuntu 18.04 — musl — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — musl — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 21 October 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5990-1 Related CVEs: CVE-2019-14697 CVE-2020-28928 Upstream summary: It was discovered that musl did not handle certain i386 math functions properly. An attacker could use this vulnerability to cause a denial […]

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Oracle Linux 8 — prometheus-jmx-exporter — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — prometheus-jmx-exporter — vulnerability — patch and remediation guide (ELSA-2020-4807)

🟡 Medium   ⏱ 10–30 min  Last verified: 21 October 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-4807 Related CVEs: CVE-2017-18640 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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IBM AIX 7.1 — CVE-2020-4668 — vulnerability — patch and remediation guide — diagnosis and fix on IBM AIX 7.1

IBM AIX 7.1 — CVE-2020-4668 — vulnerability — patch and remediation guide

🟠 High   ⏱ 30–90 min  Last verified: 21 October 2020 Affected versions: IBM AIX 7.1 📖 ~4 min read  •  Source: NVD CVE-2020-4668, IBM Support Bulletin CVE: CVE-2020-4668 NVD summary: IBM Sterling B2B Integrator Standard Edition 6.0.0.0 through 6.0.3.5, 6.1.0.0 through 6.1.0.3, and 6.1.1.0 is vulnerable to cross-site request forgery which could allow an […]

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