Package Management

Oracle Linux 8 — systemd — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — systemd — security and stability fixes — required update (ELSA-2020-0575)

🟠 High   ⏱ 15–60 min  Last verified: 3 December 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-0575 Related CVEs: CVE-2020-1712 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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Debian 10 — codemirror-js — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — codemirror-js — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 3 December 2020 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-7760 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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Common Problems 118389

Ubuntu 16.04 LTS – apt update fails with NO_PUBKEY for third-party repository – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 3 December 2020 Affected versions: Ubuntu 16.04 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 Install MongoDB on SLES 15 — step-by-step SUSE Linux Enterprise 15 tutorial on Progressive Robot

How to Install MongoDB on SLES 15

Introduction This tutorial covers How to Install MongoDB on SLES 15 on SLES 15. SLES 15 (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 15 system is up to date: zypper refresh && […]

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Ubuntu 18.04 — libssh2 — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — libssh2 — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 3 December 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6371-1 Related CVEs: CVE-2020-22218 Upstream summary: It was discovered that libssh2 incorrectly handled memory access. An attacker could possibly use this issue to cause a crash. Table of contents Symptom […]

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Ubuntu 20.04 — targetcli-fb — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — targetcli-fb — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 3 December 2020 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4871-1 Related CVEs: CVE-2020-10699 CVE-2020-13867 Upstream summary: It was discovered that targetcli-fb did not properly manage socket permissions. A local attacker could use this issue to modify the iSCSI configuration […]

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How to Configure Fail2ban on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure Fail2ban on Oracle Linux 8

Introduction This tutorial demonstrates how to Configure Fail2ban on Oracle Linux 8 on Oracle Linux 8. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered Oracle Linux 8 system with the default AppStream […]

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How to Configure Jenkins Pipelines and Jenkinsfile on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Configure Jenkins Pipelines and Jenkinsfile on RHEL 8

Jenkins Pipelines allow you to define your entire build, test, and deployment workflow as code stored alongside your application. On RHEL 8 with Jenkins already installed, the Declarative Pipeline syntax offers a structured, human-readable format that is easy to maintain and review. This tutorial covers creating a Pipeline job in the Jenkins UI, writing a […]

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Oracle Linux 8 — device-mapper-multipath — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — device-mapper-multipath — security and stability fixes — required update (ELSA-2023-2948)

🟡 Medium   ⏱ 10–30 min  Last verified: 2 December 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-2948 Related CVEs: CVE-2022-41973 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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