November 2019 - Page 8 of 66

How to Configure sudo for Non-Root Users on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure sudo for Non-Root Users on Debian 9

Introduction How to Configure sudo for Non-Root Users on Debian 9 is a fundamental operation for any administrator maintaining a Debian 9 Stretch server. Debian 9 Stretch ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian […]

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Common Problems 115957

Ubuntu 26.04 LTS – cloud-init reconfigures network unexpectedly at boot – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Ubuntu 26.04 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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Common Problems 115114

firewalld Rich Rule Order Causing Unexpected Access

🟡 Medium   ⏱ 5–30 min  Last verified: 20 May 2026 📖 ~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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Common Problems 112941

Windows Server 2016 — WinSxS Growth Exhausts C: and Breaks Patch Installation — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 18 May 2026 Affected versions: Windows Server 2016 📖 ~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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How to Configure Large Page Support on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Configure Large Page Support on IBM AIX 7.2

Introduction IBM AIX 7.2 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 7.2 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to configure large page support on ibm aix 7.2 on […]

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How to Install MongoDB 8 on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Install MongoDB 8 on RHEL 10

Introduction RHEL 10 ships with a stable, security-hardened base that makes deploying install mongodb 8 both straightforward and auditable. This tutorial covers the complete procedure for how to Install MongoDB 8 on RHEL 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for network-facing services. Prerequisites Before you begin, […]

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How to Manage Active Directory Replication on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Manage Active Directory Replication on Windows Server 2012 R2

How to Manage Active Directory Replication on Windows Server 2012 R2 Active Directory replication is the process by which changes made on one domain controller are propagated to all other domain controllers in the domain and forest. Replication ensures that the directory remains consistent across all DCs, regardless of which DC accepted the original change. […]

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How to Manage Windows Server 2012 R2 with Windows Admin Center — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Manage Windows Server 2012 R2 with Windows Admin Center

How to Manage Windows Server 2012 R2 with Windows Admin Center Windows Admin Center (WAC) is Microsoft’s modern, browser-based server management platform that provides a unified interface for managing Windows Server, failover clusters, and hyperconverged infrastructure. While Windows Admin Center itself is a modern tool developed after Windows Server 2012 R2’s initial release, it fully […]

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

Debian 10 — libarchive — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-18408 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 Set Up Two-Factor Authentication (2FA) for SSH on Ubuntu 26.04 — step-by-step Linux tutorial on Progressive Robot

How to Set Up Two-Factor Authentication (2FA) for SSH on Ubuntu 26.04

Two-factor authentication (2FA) for SSH adds an extra layer of security by requiring both your SSH key and a time-based one-time password (TOTP) from an authenticator app. This guide configures 2FA for SSH using Google Authenticator PAM on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 LTS SSH access with […]

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