Linux

Oracle Linux 8 — libuv — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — libuv — vulnerability — patch and remediation guide (ELSA-2021-3075)

🟢 Low   ⏱ 5–15 min  Last verified: 24 April 2022 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-3075 Related CVEs: CVE-2021-22918 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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How to Configure Prometheus AlertManager on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Configure Prometheus AlertManager on RHEL 8

Prometheus AlertManager handles alert routing, grouping, and silencing so that your monitoring stack delivers the right notifications to the right people at the right time. On RHEL 8, deploying AlertManager as a systemd service gives you a production-ready setup that starts automatically on boot and integrates cleanly with an existing Prometheus instance. This tutorial walks […]

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Amazon Linux 2 — python-paramiko — vulnerability — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — python-paramiko — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2ANSIBLE2-2023-002 Related CVEs: CVE-2022-24302 Upstream summary: In Paramiko before 2.10.1, a race condition (between creation and chmod) in the write_private_key_file function could allow unauthorized information disclosure. (CVE-2022-24302) Table of contents […]

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How To Implement Pagination in MySQL with PHP on Ubuntu 18.04 — step-by-step Linux tutorial on Progressive Robot

How To Implement Pagination in MySQL with PHP on Ubuntu 18.04

Pagination is the concept of constraining the number of returned rows in a recordset into separate, orderly pages to allow easy navigation between them, so when there is a large dataset you can configure your pagination to only return a specific number of rows on each page. In this tutorial, you’ll build a PHP script to connect to your database and introduce pagination to your script using the MySQL LIMIT clause.

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AlmaLinux 8 — flatpak-xdg-utils — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — flatpak-xdg-utils — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2021:1781 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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How to Configure Kubernetes RBAC on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Configure Kubernetes RBAC on CentOS Stream 9

Introduction How to Configure Kubernetes RBAC on CentOS Stream 9 on CentOS Stream 9 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration is […]

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Debian 10 — nbd — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — nbd — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 23 April 2022 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2022-26495 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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AlmaLinux 8 — alsa-sof-firmware — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — alsa-sof-firmware — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALEA-2022:2037 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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Debian 10 — librecad — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — librecad — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 23 April 2022 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-21898 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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Debian 11 — barnowl — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — barnowl — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 23 April 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2009-0363 CVE-2010-0793 CVE-2010-2725 Upstream summary: Multiple buffer overflows in (a) BarnOwl before 1.0.5 and (b) owl 2.1.11 allow remote attackers to execute arbitrary code via vectors involving (1) […]

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