Firewall

How to Capture Packets with tcpdump on Debian 13 — step-by-step Debian 13 tutorial on Progressive Robot

How to Capture Packets with tcpdump on Debian 13

Introduction Deploying capture packets with tcpdump on a Debian 13 Trixie machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites You will need a registered […]

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How to Secure Nginx with Let's Encrypt SSL on Ubuntu 24.04 — step-by-step Linux tutorial on Progressive Robot

How to Install Nginx on Ubuntu 24.04

Nginx is a high-performance web server and reverse proxy widely used in production. This guide installs and configures Nginx on Ubuntu 24.04 LTS and enables it to serve content over HTTP. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server A user with sudo privileges UFW firewall configured Step 1 – Update […]

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Common Problems 114063

RHEL 10 – NFS mount hangs at boot due to ordering dependencies – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 3 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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Common Problems 113905

RHEL 10 – systemd service stuck in activating state after boot

🟠 High   ⏱ 5–30 min  Last verified: 2 November 2025 Affected versions: RHEL 10 RHEL 10.0 RHEL 10.1 📖 ~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 & […]

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How to Set Up a Kubernetes Dashboard on Oracle Linux 10 — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Set Up a Kubernetes Dashboard on Oracle Linux 10

Introduction Setting up set up a kubernetes dashboard on oracle linux 10 on a Oracle Linux 10 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Set Up a Kubernetes Dashboard on Oracle Linux 10, with all the commands you need, the SELinux and firewalld […]

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Common Problems 124068

Oracle Linux 10 – auditd backlog overflow causes dropped audit events – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 2 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 Perform a Security Audit with auditd on Oracle Linux 10 — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Perform a Security Audit with auditd on Oracle Linux 10

Introduction Oracle Linux 10 ships with a stable, security-hardened base that makes deploying perform a security audit with auditd on oracle linux 10 both straightforward and auditable. This tutorial covers the complete procedure for how to Perform a Security Audit with auditd on Oracle Linux 10, including dnf module streams where applicable, systemd unit management, […]

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How to Configure SSH Keys for GitHub on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Configure SSH Keys for GitHub on RHEL 10

Introduction RHEL 10 ships with a stable, security-hardened base that makes deploying configure ssh keys for github both straightforward and auditable. This tutorial covers the complete procedure for how to Configure SSH Keys for GitHub on RHEL 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for network-facing services. […]

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Common Problems 124025

Oracle Linux 10 – chronyd not synchronizing time with enterprise NTP – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 2 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 Install Fluentd on Debian 13 — step-by-step Debian 13 tutorial on Progressive Robot

How to Install Fluentd on Debian 13

Introduction How to Install Fluentd 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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