Logging Monitoring

How to Set Up Uptime Kuma on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Set Up Uptime Kuma on CentOS Stream 9

Introduction This tutorial demonstrates how to Set Up Uptime Kuma on CentOS Stream 9 on CentOS Stream 9. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered CentOS Stream 9 system with the […]

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Common Problems 114541

Grub Entry Boots Wrong Kernel by Default

🟡 Medium   ⏱ 5–30 min  Last verified: 26 November 2023 📖 ~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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Oracle Linux 9 — buildah — bug fix update — issues resolved — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — buildah — bug fix update — issues resolved (ELSA-2024-2550)

🟡 Medium   ⏱ 10–30 min  Last verified: 26 November 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2024-2550 Related CVEs: CVE-2024-24786 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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NetBSD 9.4 — suse_libdbus — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on NetBSD 9.4

NetBSD 9.4 — suse_libdbus — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: NetBSD 9.4 📖 ~4 min read  •  Source: pkgsrc audit-packages entry Related CVEs: CVE-2014-3477 CVE-2014-3532 CVE-2014-3533 Upstream summary: pkgsrc audit-packages flagged suse{,32}_libdbus<13.1nb1 for vulnerability class 'denial-of-service'. Reference: http://support.novell.com/security/cve/CVE-2014-3477.html Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage […]

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How to Configure SSH Hardening on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Configure SSH Hardening on FreeBSD 14

Introduction Deploying configure ssh hardening on freebsd 14 on a FreeBSD 14 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the standard base […]

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NetBSD 9.4 — py36-expat — vulnerability — patch and remediation guide — diagnosis and fix on NetBSD 9.4

NetBSD 9.4 — py36-expat — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: NetBSD 9.4 📖 ~4 min read  •  Source: pkgsrc audit-packages entry Related CVEs: CVE-2018-14647 Upstream summary: pkgsrc audit-packages flagged py36-expat<3.6.7 for vulnerability class 'denial-of-service'. Reference: https://nvd.nist.gov/vuln/detail/CVE-2018-14647 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis […]

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How to Install MariaDB on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Install MariaDB on FreeBSD 14

Introduction Deploying install mariadb on freebsd 14 on a FreeBSD 14 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the standard base + […]

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Common Problems 120089

Debian 12: UFW blocks required application port

🟡 Medium   ⏱ 5–30 min  Last verified: 26 November 2023 Affected versions: Debian 12 📖 ~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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How to Enable HTTP/2 in Nginx on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Enable HTTP/2 in Nginx on FreeBSD 14

Introduction Deploying enable http/2 in nginx on freebsd 14 on a FreeBSD 14 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the standard […]

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