Security Hardening

How to Install Munin Monitoring on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install Munin Monitoring on Debian 9

Introduction Deploying install munin monitoring 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 Debian 9 […]

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SLES 15 — rsvg-view — vulnerability — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — rsvg-view — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 29 September 2019 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2021:1310-1 (see also SUSE bugzilla) Related CVEs: CVE-2018-20991 Upstream summary: An issue was discovered in the smallvec crate before 0.6.3 for Rust. The Iterator implementation mishandles destructors, leading to a double free. […]

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Oracle Linux 8 — poppler — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — poppler — vulnerability — patch and remediation guide (ELSA-2020-4643)

🟢 Low   ⏱ 5–15 min  Last verified: 29 September 2019 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-4643 Related CVEs: CVE-2019-14494 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 121699

Debian 9 Cron Job Not Running at Scheduled Time

🟡 Medium   ⏱ 5–30 min  Last verified: 28 September 2019 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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FreeBSD 12 — libgd — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — libgd — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 28 September 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: libgd — Denial of servica via double free Related CVEs: CVE-2017-6362 CVE-2017-7890 Upstream summary: libgd developers report: Double free vulnerability in the gdImagePngPtr function in libgd2 before 2.2.5 allows remote […]

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Common Problems 121698

GRUB Menu Missing After Bootloader Update

🔴 Critical   ⏱ 5–30 min  Last verified: 28 September 2019 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 118072

Ubuntu 18.04 LTS rsyslog stops writing logs after disk pressure

🟡 Medium   ⏱ 5–30 min  Last verified: 28 September 2019 📖 ~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 Set Up a Go Web Application on SLES 12 — step-by-step SUSE Linux Enterprise 12 tutorial on Progressive Robot

How to Set Up a Go Web Application on SLES 12

Introduction This tutorial covers How to Set Up a Go Web Application on SLES 12 on SLES 12. SLES 12 (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 12 system is up to […]

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Common Problems 114897

DNF Fails with Metadata Checksum Mismatch

🟡 Medium   ⏱ 5–30 min  Last verified: 28 September 2019 📖 ~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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Common Problems 112507

Windows Server 2019 – iSCSI initiator driver sessions fail to reconnect – Fix and Prevention

🟠 High   ⏱ 5–30 min  Last verified: 28 September 2019 Affected versions: Windows Server 2019 📖 ~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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