Troubleshooting

SLES 15 — librrd8 — vulnerability — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — librrd8 — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2017:0103-1 (see also SUSE bugzilla) Related CVEs: CVE-2013-2131 Upstream summary: Format string vulnerability in the rrdtool module 1.4.7 for Python, as used in Zenoss, allows context-dependent attackers to cause a denial of […]

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FreeBSD 12 — opera — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — opera — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: opera — moderately severe issue Related CVEs: CVE-2004-0411 CVE-2004-0717 CVE-2004-0718 CVE-2004-0721 CVE-2004-1156 CVE-2004-1157 CVE-2004-1158 CVE-2004-1160  +12 more Upstream summary: Opera reports: Fixed a moderately severe issue, as reported by Attila […]

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How to Configure Logrotate for Application Logs on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Configure Logrotate for Application Logs on RHEL 8

Logrotate is the standard log rotation utility on RHEL 8, responsible for automatically compressing, archiving, and pruning log files before they consume excessive disk space. Without it, long-running applications like NGINX, custom services, and Java applications can silently fill a filesystem partition and cause outages. Logrotate ships with RHEL 8 and is already configured for […]

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Common Problems 122692

NFS Mounts Intermittently Freeze Applications

🟠 High   ⏱ 5–30 min  Last verified: 20 May 2026 Affected versions: FreeBSD 14 📖 ~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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Gentoo Linux — media-sound/schismtracker — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — media-sound/schismtracker — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202107-12 Related CVEs: CVE-2019-14465 CVE-2019-14523 Upstream summary: Multiple vulnerabilities have been discovered in Schism Tracker. Please review the CVE identifiers referenced below for details. Table of contents Symptom & Impact Environment & […]

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Common Problems 116086

Kernel Panic or Boot Failure After Update

🟡 Medium   ⏱ 5–30 min  Last verified: 20 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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How to Harden SSH on SLES 12 — step-by-step SUSE Linux Enterprise 12 tutorial on Progressive Robot

How to Harden SSH on SLES 12

Introduction This tutorial covers How to Harden SSH 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. Step 1 — Edit SSH Configuration vi /etc/ssh/sshd_config Step 2 — Recommended Settings […]

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FreeBSD 12 — py37-cairosvg — security advisory — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — py37-cairosvg — security advisory — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: CairoSVG — Regular Expression Denial of Service vulnerability Upstream summary: CairoSVG security advisories: When processing SVG files, the python package CairoSVG uses two regular expressions which are vulnerable to Regular […]

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FreeBSD 12 — pear-twig-twig — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — pear-twig-twig — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: pear-twig — remote code execution Related CVEs: CVE-2015-7809 Upstream summary: Fabien Potencier reports: End users can craft valid Twig code that allows them to execute arbitrary code (RCEs) via the […]

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How to Install and Configure Varnish Cache on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Install and Configure Varnish Cache on FreeBSD 12

Introduction This guide explains how to Install and Configure Varnish Cache on FreeBSD 12 on FreeBSD 12. FreeBSD uses the pkg(8) binary package manager, rc.conf(5) for service startup configuration, and pf(4) as its primary packet filter. There is no SELinux or AppArmor — instead, FreeBSD provides the MAC (Mandatory Access Control) framework and Capsicum for […]

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