Linux

Comment installer R sur Ubuntu 20.04 [Démarrage rapide] — step-by-step Linux tutorial on Progressive Robot

Comment installer R sur Ubuntu 20.04 [Démarrage rapide]

Langage de programmation à code source ouvert, R est spécialisé dans le calcul statistique et les graphiques. Dans ce tutoriel, nous allons installer R sur un serveur Ubuntu 20.04. Pour une version plus détaillée de ce tutoriel, avec des explications plus approfondies sur…

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Debian 10 — modsecurity-apache — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — modsecurity-apache — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 28 July 2021 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-42717 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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AlmaLinux 8 — nspr — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — nspr — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2021:3572 Related CVEs: CVE-2020-25648 Upstream summary: Network Security Services (NSS) is a set of libraries designed to support the cross-platform development of security-enabled client and server applications. Netscape Portable Runtime (NSPR) provides […]

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Arch Linux — wpa_supplicant — multiple vulnerabilities (11 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — wpa_supplicant — multiple vulnerabilities (11 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-202102-25 Related CVEs: CVE-2021-0326 CVE-2017-13088 CVE-2017-13087 CVE-2017-13082 CVE-2017-13081 CVE-2017-13080 CVE-2017-13079 CVE-2017-13078  +3 more Upstream summary: Type: arbitrary code execution. Status: Fixed. Affected: 2:2.9-7. Fixed in: 2:2.9-8. Group: AVG-1530. Table of […]

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How to Set Up Tripwire for File Integrity Monitoring on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Set Up Tripwire for File Integrity Monitoring on RHEL 8

File Integrity Monitoring (FIM) detects unauthorized changes to critical system files, binaries, and configuration directories — a key control for detecting intrusions and satisfying compliance requirements such as PCI-DSS and CIS benchmarks. Tripwire Open Source computes cryptographic hashes of monitored files at a baseline and alerts you to any subsequent modifications. This tutorial covers installing […]

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

Oracle Linux 8 — GNOME security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2020-1766)

🟡 Medium   ⏱ 10–30 min  Last verified: 27 July 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-1766 Related CVEs: CVE-2019-12448 CVE-2019-12449 CVE-2019-12447 CVE-2018-20337 CVE-2019-3825 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative […]

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Common Problems 121623

Debian 9: UFW blocks required application ports

🟡 Medium   ⏱ 5–30 min  Last verified: 27 July 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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Common Problems 118981

Ubuntu 14.04 LTS SSH login fails with permission denied

🟠 High   ⏱ 5–30 min  Last verified: 27 July 2021 Affected versions: 14.04 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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Common Problems 117516

Ubuntu 20.04 DNS Resolution Fails Intermittently

🟡 Medium   ⏱ 5–30 min  Last verified: 27 July 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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