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How to Configure sudo and Sudoers on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Configure sudo and Sudoers on RHEL 8

The sudo command allows permitted users to execute commands as root or another user without sharing the root password, making it the preferred mechanism for privilege escalation on RHEL 8. Properly configuring sudo is a foundational security task: it creates an auditable record of privileged actions and limits blast radius when accounts are compromised. This […]

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Como fazer cálculos matemáticos com operadores em Go — step-by-step Programming tutorial on Progressive Robot

Como fazer cálculos matemáticos com operadores em Go

Os números são comuns na programação. Eles são usados para representar coisas como: dimensões de tela, localizações geográficas, dinheiro e pontos, a quantidade de tempo que passa em um vídeo, posições de avatares de jogos, cores através da atribuição de códigos numéricos e…

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Common Problems 120512

Debian 11: Network outage from ifupdown and NetworkManager conflict

🟠 High   ⏱ 5–30 min  Last verified: 15 October 2022 Affected versions: Debian 11 📖 ~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 13 — teeworlds — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — teeworlds — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 October 2022 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: Teeworlds — Buffer Overflow Related CVEs: CVE-2021-43518 Upstream summary: NVD reports: Teeworlds up to and including 0.7.5 is vulnerable to Buffer Overflow. A map parser does not validate m_Channels value […]

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FreeBSD 13 — py39-httpx — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — py39-httpx — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 October 2022 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: py-httpx — input validation vulnerability Related CVEs: CVE-2021-41945 Upstream summary: lebr0nli reports: Encode OSS httpx <=1.0.0.beta0 is affected by improper input validation in `httpx.URL`, `httpx.Client` and some functions using `httpx.URL.copy_with`. […]

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Common Problems 116954

Ubuntu 22.04 LTS Boot Fails Due to Invalid fstab UUID

🟡 Medium   ⏱ 5–30 min  Last verified: 15 October 2022 📖 ~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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FreeBSD 13 — mcollective — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — mcollective — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 October 2022 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: mcollective — cert valication issue Related CVEs: CVE-2014-3251 Upstream summary: Melissa Stone reports: The MCollective aes_security public key plugin does not correctly validate certs against the CA. By exploiting this […]

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How to Use AIX Security Compliance Assessment on IBM AIX 7.3 — step-by-step IBM AIX 7.3 tutorial on Progressive Robot

How to Use AIX Security Compliance Assessment on IBM AIX 7.3

Introduction IBM AIX 7.3 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.3 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to use aix security compliance assessment on IBM AIX 7.3 […]

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AlmaLinux 9 — conmon — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 9

AlmaLinux 9 — conmon — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 9 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2023:2222 Related CVEs: CVE-2022-41717 Upstream summary: Conmon is an OCI container runtime monitor. Security Fix(es): * golang: net/http: excessive memory growth in a Go server accepting HTTP/2 requests (CVE-2022-41717) For more details […]

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