Networking

How to Configure GitLab CI/CD on Oracle Linux 9 — step-by-step Oracle Linux 9 tutorial on Progressive Robot

How to Configure GitLab CI/CD on Oracle Linux 9

Introduction This tutorial demonstrates how to Configure GitLab CI/CD on Oracle Linux 9 on Oracle Linux 9. 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 9 system with the default […]

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How to Configure Windows Server Software-Defined Networking (SDN) on Windows Server 2022 — step-by-step Windows Server 2022 tutorial on Progressive Robot

How to Configure Windows Server Software-Defined Networking (SDN) on Windows Server 2022

Introduction to Software-Defined Networking on Windows Server 2022 Software-Defined Networking (SDN) on Windows Server 2022 is a Microsoft implementation of a full-stack network virtualisation solution that decouples the network control plane from the data plane, allowing centralised programmatic management of the entire network fabric. Rather than configuring individual switches, routers, and firewalls device by device, […]

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How to Configure the Firewall on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Configure the Firewall on RHEL 8

RHEL 8 ships with firewalld as its default firewall management layer, replacing the older iptables static ruleset approach with a dynamic, zone-based model. Zones define the level of trust assigned to network interfaces and traffic sources, and rules can be added or removed at runtime without flushing the entire ruleset. This guide covers the essential […]

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How to Configure Kubernetes Ingress on SLES 15 — step-by-step SUSE Linux Enterprise 15 tutorial on Progressive Robot

How to Configure Kubernetes Ingress on SLES 15

Introduction This tutorial covers How to Configure Kubernetes Ingress on SLES 15 on SLES 15. SLES 15 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Step 1 — Disable Swap swapoff -a sed -i ‘/ swap / […]

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Common Problems 111849

Windows Server 2022 — Data Deduplication Optimization Jobs Stuck in Queued State — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 17 May 2023 Affected versions: Windows Server 2022 📖 ~1 min read Table of contents Symptom & Impact Quick Checks Deep Diagnosis Primary Fix Verification Prevention & Hardening Symptom & Impact Dedup jobs remain queued for extended periods, reducing expected storage savings and increasing backup footprint. Volumes […]

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How to Configure Container Networking on Oracle Linux 9 — step-by-step Oracle Linux 9 tutorial on Progressive Robot

How to Configure Container Networking on Oracle Linux 9

Introduction How to Configure Container Networking on Oracle Linux 9 on Oracle Linux 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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How to Set Up Active Directory Backup and Recovery on Windows Server 2022 — step-by-step Windows Server 2022 tutorial on Progressive Robot

How to Set Up Active Directory Backup and Recovery on Windows Server 2022

Understanding Active Directory Sites and Services Active Directory Sites and Services is the component of AD DS responsible for managing the physical topology of your network — how domain controllers are grouped by network location, how replication traffic flows between them, and how clients are directed to the nearest domain controller for authentication. Proper site […]

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Como Configurar um Firewall com o UFW no Ubuntu 20.04 — step-by-step Linux tutorial on Progressive Robot

Como Configurar um Firewall com o UFW no Ubuntu 20.04

O UFW, ou Uncomplicated Firewall, é uma interface de gerenciamento simplificado de firewall que esconde a complexidade das tecnologias de filtragem de pacotes de baixo nível, como iptables e nftables. Se você deseja começar a proteger sua rede, mas não tem certeza sobre qual…

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How to Set Up Zabbix on Oracle Linux 9 — step-by-step Oracle Linux 9 tutorial on Progressive Robot

How to Set Up Zabbix on Oracle Linux 9

Introduction Setting up set up zabbix on oracle linux 9 on a Oracle Linux 9 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Set Up Zabbix on Oracle Linux 9, with all the commands you need, the SELinux and firewalld considerations to keep in […]

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Common Problems 114419

Systemd Service Fails At Boot But Works Manually

🟡 Medium   ⏱ 5–30 min  Last verified: 16 May 2023 📖 ~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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