Boot Startup

Ubuntu 22.04 — twitter-bootstrap4 — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — twitter-bootstrap4 — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 23 September 2024 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7556-1 Related CVEs: CVE-2024-6484 CVE-2024-6531 CVE-2024-6485 Upstream summary: It was discovered that Bootstrap did not correctly sanitize certain input in the carousel component. An attacker could possibly use this issue […]

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How to Audit Security with Lynis on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Audit Security with Lynis 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 audit security with lynis 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 from any Linux […]

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How to Deploy a Ruby on Rails Application on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Deploy a Ruby on Rails Application on FreeBSD 14

Introduction This guide explains how to Deploy a Ruby on Rails Application on FreeBSD 14 on FreeBSD 14. 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 […]

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

How to Install Lua on FreeBSD 14

Introduction Deploying install lua 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 Install Jupyter Notebook on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Install Jupyter Notebook on FreeBSD 14

Introduction How to Install Jupyter Notebook 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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Common Problems 114463

RHEL 9 kernel update completed but old kernel still boots

🟡 Medium   ⏱ 5–30 min  Last verified: 14 September 2024 📖 ~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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Alpine Linux 3.20 — u-boot — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux 3.20

Alpine Linux 3.20 — u-boot — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.20 / fixed in 2021.04-r0 📖 ~4 min read  •  Source: Alpine secdb entry — u-boot 2021.04-r0 Related CVEs: CVE-2021-27097 CVE-2021-27138 Upstream summary: Alpine main repository for vv3.20 ships u-boot 2021.04-r0 which addresses CVE-2021-27097. Table of contents Symptom & Impact […]

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Common Problems 124627

Oracle Linux 9 – Common Problem 017 – Diagnosis and Fix

🟢 Low   ⏱ 5–30 min  Last verified: 8 September 2024 Affected versions: Oracle Linux 9 📖 ~2 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 Configure auditd on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Configure auditd on FreeBSD 14

Introduction Deploying configure auditd 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 116570

Ubuntu 24.04 LTS – DKMS build fails after kernel update – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 8 September 2024 Affected versions: Ubuntu 24.04 LTS 📖 ~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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