Linux

Oracle Linux 8 — sane-backends — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — sane-backends — vulnerability — patch and remediation guide (ELSA-2020-2902)

🟠 High   ⏱ 15–60 min  Last verified: 9 August 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-2902 Related CVEs: CVE-2020-12861 CVE-2020-12865 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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How To Install BigBlueButton on Ubuntu 16.04 — step-by-step Linux tutorial on Progressive Robot

How To Install BigBlueButton on Ubuntu 16.04

BigBlueButton is an open source, feature-rich virtual classroom where you can teach your students. In this guide, you will install a BigBlueButton server along with the client interface called Greenlight. Greenlight makes your virtual classroom accessible from any browser and enforces the use of HTTPS to keep information secure.

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SLES 12 — php5 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — php5 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 9 August 2020 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2016:1504-1 (see also SUSE bugzilla) Related CVEs: CVE-2016-4542 CVE-2016-4543 CVE-2016-4544 CVE-2020-7060 CVE-2015-2787 CVE-2015-3329 CVE-2015-6831 CVE-2015-8879  +12 more Upstream summary: The exif_process_IFD_TAG function in ext/exif/exif.c in PHP before 5.5.35, 5.6.x before 5.6.21, and […]

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Common Problems 121191

Debian 10 – Certbot Renewal Fails in Automation – Reliable ACME Recovery

🟠 High   ⏱ 5–30 min  Last verified: 8 August 2020 Affected versions: Debian 10 📖 ~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 118091

Ubuntu 18.04 Nginx 502 Bad Gateway with PHP-FPM

🟡 Medium   ⏱ 5–30 min  Last verified: 8 August 2020 📖 ~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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How to Configure RAID with mdadm on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure RAID with mdadm on Debian 10

Introduction This guide explains how to Configure RAID with mdadm on Debian 10 on Debian 10 Buster. Debian Buster uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 10 install with the […]

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Gentoo Linux — net-p2p/bitcoin-qt — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — net-p2p/bitcoin-qt — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202009-18 Related CVEs: CVE-2019-15947 CVE-2020-14198 Upstream summary: Multiple vulnerabilities have been discovered in Bitcoin. Please review the CVE identifiers referenced below for details. Table of contents Symptom & Impact Environment & Reproduction […]

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