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Oracle Linux 8 — java-1.8.0-openjdk — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — java-1.8.0-openjdk — vulnerability — patch and remediation guide (ELSA-2019-1816)

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-1816 Related CVEs: CVE-2019-2786 CVE-2019-2842 CVE-2019-2745 CVE-2019-2769 CVE-2019-2816 CVE-2019-2762 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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CI/CD Tools Comparison: Jenkins, GitLab CI, Buildbot, Drone, and Concourse — step-by-step Devops tutorial on Progressive Robot

CI/CD Tools Comparison: Jenkins, GitLab CI, Buildbot, Drone, and Concourse

Continuous integration, delivery, and deployment are strategies designed to help increase the velocity of development and the release of well-tested, usable products. In this guide, we will compare some popular free and open-source continuous integration, delivery, and deployment servers designed to make collaborative software development easier. We will take a look at Jenkins, GitLab CI, Buildbot, Drone, and Concourse.

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Oracle Linux 8 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide (ELSA-2020-5714)

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-5714 Related CVEs: CVE-2020-12653 CVE-2020-12768 CVE-2020-12657 CVE-2020-12659 CVE-2020-12654 CVE-2020-12464 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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An Introduction to SaltStack Terminology and Concepts — step-by-step DevOps tutorial on Progressive Robot

An Introduction to SaltStack Terminology and Concepts

Salt, or SaltStack, is a remote execution tool and configuration management system. Its remote execution capabilities allow administrators to run commands on various machines in parallel with a flexible targeting system. In this guide, we will discuss some of the basic concepts and terminology needed to begin learning Salt.

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How to Perform a CIS Benchmark Audit on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Perform a CIS Benchmark Audit on Debian 9

Introduction Deploying perform a cis benchmark audit on debian 9 on a Debian 9 Stretch machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites Ensure […]

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openSUSE Tumbleweed — newsboat — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — newsboat — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2020-26235 Upstream summary: In Rust time crate from version 0.2.7 and before version 0.2.23, unix-like operating systems may segfault due to dereferencing a dangling pointer […]

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Oracle Linux 8 — nss and nspr security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — nss and nspr security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2021-3572)

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-3572 Related CVEs: CVE-2020-25648 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 121549

Debian 9 Failed to Fetch Due to Proxy Misconfiguration

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 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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Common Problems 119038

Ubuntu 14.04 LTS Swap Not Activating After Reboot

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 📖 ~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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