Security Hardening

How to Set Up Two-Factor Authentication (2FA) for SSH on Ubuntu 24.04 — step-by-step Linux tutorial on Progressive Robot

How to Set Up Automatic Login Banners and SSH Warnings on Ubuntu 24.04

Login banners warn users of authorised use policies and can have legal implications for intruders. This guide configures pre-login SSH banners, post-login MOTD messages, and terminal login warnings on Ubuntu 24.04 LTS. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server A user with sudo privileges Step 1 – Create an SSH […]

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Rocky Linux 8 — tomcat — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Rocky Linux 8

Rocky Linux 8 — tomcat — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Rocky Linux 8 📖 ~4 min read  •  Source: Rocky Linux RXSA RLSA-2025:23048 Related CVEs: CVE-2025-31651 CVE-2025-55752 Upstream summary: Apache Tomcat is a servlet container for the Java Servlet and JavaServer Pages (JSP) technologies. Security Fix(es): * tomcat: Apache Tomcat: Bypass of […]

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Windows Server 2016 — KB5061078 — multiple vulnerabilities (14 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2016

Windows Server 2016 — KB5061078 — multiple vulnerabilities (14 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2016 📖 ~4 min read  •  Source: Microsoft KB5061078 • MSRC update-guide entry Related CVEs: CVE-2025-33070 CVE-2025-32712 CVE-2025-32713 CVE-2025-32714 CVE-2025-32715 CVE-2025-32716 CVE-2025-32724 CVE-2025-33064  +6 more Affected components: Windows Server 2016 Microsoft summary: Use of uninitialized resource in Windows Netlogon allows […]

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FreeBSD 12 — git — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — git — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 27 July 2025 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: git — multiple vulnerabilities Related CVEs: CVE-2009-2108 CVE-2010-2542 CVE-2014-9390 CVE-2015-7545 CVE-2016-2315 CVE-2016-2324 CVE-2018-11233 CVE-2018-11235  +12 more Upstream summary: Git development team reports: CVE-2025-27613: Gitk: When a user clones an untrusted […]

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Windows Server 2019 — KB5058379 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2019

Windows Server 2019 — KB5058379 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2019 📖 ~4 min read  •  Source: Microsoft KB5058379 • MSRC update-guide entry Related CVEs: CVE-2025-29966 CVE-2025-29967 CVE-2025-29833 CVE-2025-55229 CVE-2025-47955 CVE-2025-29959 CVE-2025-29960 CVE-2025-29964  +12 more Affected components: Windows Server 2019 (Server Core installation) Microsoft summary: Heap-based buffer overflow in Windows […]

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How to Configure HAProxy on Oracle Linux 10 — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Configure HAProxy on Oracle Linux 10

Introduction This tutorial demonstrates how to Configure HAProxy on Oracle Linux 10 on Oracle Linux 10. 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 Oracle Linux 10 system with the default AppStream […]

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Oracle Linux 9 — mingw-glib2 — security and stability fixes — required update — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — mingw-glib2 — security and stability fixes — required update (ELSA-2022-8418)

🟢 Low   ⏱ 5–15 min  Last verified: 26 July 2025 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-8418 Related CVEs: CVE-2021-28153 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 Use rsync over SSH for Backups on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Use rsync over SSH for Backups on RHEL 10

Introduction How to Use rsync over SSH for Backups on RHEL 10 on RHEL 10 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 […]

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Common Problems 127038

CentOS Stream 10 – Common Problem 158 – Diagnosis and Fix

🟠 High   ⏱ 5–30 min  Last verified: 26 July 2025 Affected versions: CentOS Stream 10 📖 ~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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