DNS

Common Problems 117094

Ubuntu 22.04 LTS initramfs Generation Fails During Upgrade

🟡 Medium   ⏱ 5–30 min  Last verified: 23 December 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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How to Install Nagios Core on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Install Nagios Core on FreeBSD 14

Introduction How to Install Nagios Core on FreeBSD 14 is a core administration task for any FreeBSD 14 server operator. FreeBSD 14 ships with the 15.0-RELEASE kernel, ZFS as the default root filesystem, Capsicum capability sandboxing improvements, and an updated ports tree. Unlike Linux distributions, FreeBSD uses rc(8) for service management, pf for packet filtering, […]

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Ubuntu 20.04 — maradns — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — maradns — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 22 December 2023 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6271-1 Related CVEs: CVE-2022-30256 CVE-2023-31137 Upstream summary: Xiang Li discovered that MaraDNS incorrectly handled certain inputs. If a user or an automated system were tricked into opening a specially crafted […]

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How to Set Up FTP Server with vsftpd on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Set Up FTP Server with vsftpd on Debian 12

Introduction Deploying set up ftp server with vsftpd on debian 12 on a Debian 12 Bookworm 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 […]

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Common Problems 120103

Debian 12 – logrotate fails due to syntax errors or missing permissions

🟡 Medium   ⏱ 5–30 min  Last verified: 22 December 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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Alpine Linux 3.18 — knot-resolver — multiple vulnerabilities (8 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux 3.18

Alpine Linux 3.18 — knot-resolver — multiple vulnerabilities (8 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.18 / fixed in 5.7.1-r0 📖 ~4 min read  •  Source: Alpine secdb entry — knot-resolver 5.7.1-r0 Related CVEs: CVE-2023-50387 CVE-2023-50868 CVE-2022-40188 CVE-2020-12667 CVE-2019-19331 CVE-2019-10190 CVE-2019-10191 CVE-2018-1110 Upstream summary: Alpine community repository for vv3.18 ships knot-resolver 5.7.1-r0 which addresses CVE-2023-50387. […]

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How to Configure rkhunter Rootkit Scanner on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Configure rkhunter Rootkit Scanner on Debian 12

Introduction Deploying configure rkhunter rootkit scanner on debian 12 on a Debian 12 Bookworm 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 You will […]

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How to Set Up a Git Server with Gitea on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Set Up a Git Server with Gitea on FreeBSD 14

Introduction FreeBSD 14 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up set up a git server with gitea on freebsd 14 on FreeBSD 14 follows the rc.conf/service(8) paradigm rather than systemd, which means enabling a service and configuring its startup options are done differently […]

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How to Install Node.js on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Install Node.js on FreeBSD 14

Introduction Deploying install node.js 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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How to Configure MariaDB Galera Cluster on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Configure MariaDB Galera Cluster on FreeBSD 14

Introduction Deploying configure mariadb galera cluster 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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