Package Management

Common Problems 121469

Debian 9 APT Lock Contention During Package Operations

🟡 Medium   ⏱ 5–30 min  Last verified: 18 January 2021 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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IBM AIX 7.2 — CVE-2021-38954 — vulnerability — patch and remediation guide — diagnosis and fix on IBM AIX 7.2

IBM AIX 7.2 — CVE-2021-38954 — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 15–45 min  Last verified: 18 January 2021 Affected versions: IBM AIX 7.2 📖 ~4 min read  •  Source: NVD CVE-2021-38954, IBM Support Bulletin CVE: CVE-2021-38954 NVD summary: IBM Sterling B2B Integrator Standard Edition 6.0.0.0 through 6.0.3.5 and 6.1.0.0 through 6.1.1.0 could disclose sensitive version information that could aid in future attacks […]

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Common Problems 118424

Ubuntu 16.04 LTS DNS resolution fails intermittently on production hosts

🟠 High   ⏱ 5–30 min  Last verified: 18 January 2021 Affected versions: 16.04 📖 ~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 […]

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How to Manage Storage with Parted on SLES 12 — step-by-step SUSE Linux Enterprise 12 tutorial on Progressive Robot

How to Manage Storage with Parted on SLES 12

Introduction This tutorial covers How to Manage Storage with Parted on SLES 12 on SLES 12. SLES 12 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Prerequisites Ensure your SLES 12 system is up to date: zypper […]

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Common Problems 115456

RHEL 7 yum rpmdb Corruption Prevents Package Operations

🟠 High   ⏱ 5–30 min  Last verified: 18 January 2021 Affected versions: RHEL 7 📖 ~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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Alpine Linux edge — ghostscript — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — ghostscript — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 9.54-r1 📖 ~4 min read  •  Source: Alpine secdb entry — ghostscript 9.54-r1 Related CVEs: CVE-2021-3781 CVE-2020-16287 CVE-2020-16288 CVE-2020-16289 CVE-2020-16290 CVE-2020-16291 CVE-2020-16292 CVE-2020-16293  +12 more Upstream summary: Alpine community repository for vedge ships ghostscript 9.54-r1 which […]

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FreeBSD 12 — openldap24-server — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — openldap24-server — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 18 January 2021 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: nested filters leads to stack overflow Related CVEs: CVE-2020-12243 Upstream summary: Howard Chu reports: nested filters leads to stack overflow Table of contents Symptom & Impact Environment & Reproduction Root […]

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How to Set Up STONITH for Cluster Fencing on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up STONITH for Cluster Fencing on Oracle Linux 8

Introduction Setting up set up stonith for cluster fencing on oracle linux 8 on a Oracle Linux 8 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Set Up STONITH for Cluster Fencing on Oracle Linux 8, with all the commands you need, the SELinux […]

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Ubuntu 18.04 — tomcat7 — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — tomcat7 — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 18 January 2021 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6908-1 Related CVEs: CVE-2019-0221 CVE-2020-9484 CVE-2021-25329 Upstream summary: It was discovered that the Tomcat SSI printenv command echoed user provided data without escaping it. An attacker could possibly use this […]

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Oracle Linux 8 — openjpeg2 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — openjpeg2 — vulnerability — patch and remediation guide (ELSA-2020-0570)

🟠 High   ⏱ 15–60 min  Last verified: 18 January 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-0570 Related CVEs: CVE-2020-8112 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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