Backup Recovery

How to Deploy a Node.js App with PM2 on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Deploy a Node.js App with PM2 on FreeBSD 13

Introduction Deploying deploy a node.js app with pm2 on freebsd 13 on a FreeBSD 13 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within […]

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How to Configure Prometheus Alerting Rules on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Configure Prometheus Alerting Rules on CentOS Stream 9

Introduction This tutorial demonstrates how to Configure Prometheus Alerting Rules on CentOS Stream 9 on CentOS Stream 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 CentOS Stream 9 system with the […]

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How to Deploy Applications in FreeBSD Jails on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Deploy Applications in FreeBSD Jails on FreeBSD 13

Introduction Deploying deploy applications in freebsd jails on freebsd 13 on a FreeBSD 13 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the […]

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How to Install Nagios on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Install Nagios on CentOS Stream 9

Introduction Setting up install nagios on centos stream 9 on a CentOS Stream 9 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Install Nagios on CentOS Stream 9, with all the commands you need, the SELinux and firewalld considerations to keep in mind, and […]

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Common Problems 113535

Windows Server 2012 R2 — Asymmetric routing through multi-homed NICs triggers firewall state drops — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 28 December 2021 Affected versions: Windows Server 2012 R2 📖 ~2 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 […]

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How to Install Nginx on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Install Nginx on FreeBSD 13

Introduction FreeBSD 13 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up install nginx on freebsd 13 on FreeBSD 13 follows the rc.conf/service(8) paradigm rather than systemd, which means enabling a service and configuring its startup options are done differently from any Linux distribution. This […]

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How to Use Skopeo for Container Images on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Use Skopeo for Container Images on CentOS Stream 9

Introduction CentOS Stream 9 ships with a stable, security-hardened base that makes deploying use skopeo for container images on centos stream 9 both straightforward and auditable. This tutorial covers the complete procedure for how to Use Skopeo for Container Images on CentOS Stream 9, including dnf module streams where applicable, systemd unit management, and the […]

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Common Problems 117395

APT Lock File Held by unattended-upgrades

🟡 Medium   ⏱ 5–30 min  Last verified: 27 December 2021 Affected versions: 20.04 📖 ~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 […]

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How to Set Up Pacemaker and Corosync on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Set Up Pacemaker and Corosync on FreeBSD 13

Introduction FreeBSD 13 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up set up pacemaker and corosync on freebsd 13 on FreeBSD 13 follows the rc.conf/service(8) paradigm rather than systemd, which means enabling a service and configuring its startup options are done differently from any […]

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How to Configure ArgoCD on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Configure ArgoCD on CentOS Stream 9

Introduction CentOS Stream 9 ships with a stable, security-hardened base that makes deploying configure argocd on centos stream 9 both straightforward and auditable. This tutorial covers the complete procedure for how to Configure ArgoCD on CentOS Stream 9, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for network-facing services. […]

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