Linux

Arch Linux — busybox — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — busybox — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-201803-1 Related CVEs: CVE-2017-16544 CVE-2021-28831 Upstream summary: Type: arbitrary code execution. Status: Fixed. Affected: 1.27.2-1. Fixed in: 1.28.1-1. Group: AVG-512. Table of contents Symptom & Impact Environment & Reproduction Root […]

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Como adicionar espaço de swap no Ubuntu 20.04 — step-by-step Linux tutorial on Progressive Robot

Como adicionar espaço de swap no Ubuntu 20.04

Um das maneiras de se proteger contra erros de memória insuficiente em aplicativos é através da adição de um espaço de swap ao seu servidor. Neste guia, falaremos sobre como adicionar um arquivo swap a um servidor Ubuntu 20.04. <$>[warning] Aviso: embora o swap seja…

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Gentoo Linux — games-server/minecraft-server — vulnerability — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — games-server/minecraft-server — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202312-02 Related CVEs: CVE-2021-4104 Upstream summary: A vulnerability has been discovered in Minecraft Server. Please review the CVE identifier referenced below for details. Table of contents Symptom & Impact Environment & Reproduction […]

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How to Install Certbot and Automate Let's Encrypt Renewals on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Install Certbot and Automate Let’s Encrypt Renewals on RHEL 8

Let’s Encrypt provides free, trusted TLS certificates, and Certbot is the official client for obtaining and renewing them automatically. On RHEL 8, Certbot is available through the EPEL repository and integrates tightly with both Nginx and Apache via dedicated plugins. Automating renewals with the built-in systemd timer ensures your certificates never expire without manual intervention. […]

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Oracle Linux 8 — nodejs:14 security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — nodejs:14 security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2022-0350)

🟡 Medium   ⏱ 10–30 min  Last verified: 6 August 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-0350 Related CVEs: CVE-2020-28469 CVE-2021-3918 CVE-2021-37701 CVE-2021-22960 CVE-2020-7788 CVE-2021-37712 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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AlmaLinux 8 — boom-boot — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — boom-boot — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2021:4456 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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Common Problems 114903

RHEL 8 AppStream module conflict prevents package install

🟡 Medium   ⏱ 5–30 min  Last verified: 6 August 2021 📖 ~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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AlmaLinux 8 — clevis — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — clevis — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2022:1857 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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Amazon Linux 2 — python-pygments — vulnerability — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — python-pygments — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2023-2198 Related CVEs: CVE-2021-27291 Upstream summary: In pygments 1.1+, fixed in 2.7.4, the lexers used to parse programming languages rely heavily on regular expressions. Some of the regular expressions have […]

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Amazon Linux 2 — elfutils — multiple vulnerabilities (12 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — elfutils — multiple vulnerabilities (12 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2023-2259 Related CVEs: CVE-2020-21047 CVE-2021-33294 CVE-2018-16062 CVE-2018-16402 CVE-2018-16403 CVE-2018-18310 CVE-2018-18520 CVE-2018-18521  +4 more Upstream summary: The libcpu component which is used by libasm of elfutils version 0.177 (git 47780c9e), suffers […]

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