Firewall

How to Install Netdata on Debian 13 — step-by-step Debian 13 tutorial on Progressive Robot

How to Install Netdata on Debian 13

Introduction How to Install Netdata on Debian 13 is a fundamental operation for any administrator maintaining a Debian 13 Trixie server. Debian 13 Trixie 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 12. This tutorial […]

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How to Install Portainer on Debian 13 — step-by-step Debian 13 tutorial on Progressive Robot

How to Install Portainer on Debian 13

Introduction Debian 13 Trixie is built around the ethos of stability and free software. Setting up install portainer on Trixie leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Trixie freeze. Follow each step carefully and the resulting configuration will persist […]

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How to Configure PostgreSQL Remote Access and SSL on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Configure PostgreSQL Remote Access and SSL on RHEL 9

By default, PostgreSQL only accepts connections from localhost using peer or ident authentication. Enabling remote access requires two configuration changes: editing postgresql.conf to listen on a network interface, and editing pg_hba.conf to permit remote connections from specific hosts or subnets. Beyond network access, encrypting the connection with SSL/TLS is essential for any deployment where database […]

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Common Problems 113961

RHEL 10 – sshd fails to start due to invalid sshd_config directives – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 13 November 2025 Affected versions: RHEL 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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How to Automate SLES 16 Deployment with AutoYaST — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Automate SLES 16 Deployment with AutoYaST

Introduction This tutorial covers How to Automate SLES 16 Deployment with AutoYaST on SLES 16. SLES 16 (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 — Launch YaST yast Step 2 — Use YaST from […]

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Common Problems 127068

CentOS Stream 10 – Common Problem 161 – Diagnosis and Fix

🟠 High   ⏱ 5–30 min  Last verified: 12 November 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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Common Problems 124169

Oracle Linux 10 – nftables direct rule conflicts with firewalld runtime state

🟠 High   ⏱ 5–30 min  Last verified: 12 November 2025 Affected versions: Oracle Linux 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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How to Use snapper for Snapshot Management on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Use snapper for Snapshot Management on RHEL 10

Introduction How to Use snapper for Snapshot Management 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 is […]

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How to Install Docker Compose on Oracle Linux 10 — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Install Docker Compose on Oracle Linux 10

Introduction How to Install Docker Compose on Oracle Linux 10 on Oracle Linux 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 is […]

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How to Manage Users and Groups with useradd on Oracle Linux 10 — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Manage Users and Groups with useradd on Oracle Linux 10

Introduction This tutorial demonstrates how to Manage Users and Groups with useradd 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 […]

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