Networking

How to Set Up Cron Jobs on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Set Up Cron Jobs 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 cron jobs 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 […]

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How to Configure NTP Time Synchronization on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Configure NTP Time Synchronization on FreeBSD 13

Introduction This guide explains how to Configure NTP Time Synchronization on FreeBSD 13 on FreeBSD 13. FreeBSD uses the pkg(8) binary package manager, rc.conf(5) for service startup configuration, and pf(4) as its primary packet filter. There is no SELinux or AppArmor — instead, FreeBSD provides the MAC (Mandatory Access Control) framework and Capsicum for fine-grained […]

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How to Configure Prometheus Node Exporter on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Configure Prometheus Node Exporter on RHEL 8

Prometheus Node Exporter is a lightweight agent that exposes dozens of hardware and operating-system metrics — CPU usage, memory pressure, disk I/O, network throughput, and more — via a plain HTTP endpoint that Prometheus can scrape. Installing it on every RHEL 8 host in your fleet gives you a uniform, low-overhead telemetry layer that feeds […]

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How to Install and Configure ISC DHCP Server on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Install and Configure ISC DHCP Server on FreeBSD 13

Introduction This guide explains how to Install and Configure ISC DHCP Server on FreeBSD 13 on FreeBSD 13. FreeBSD uses the pkg(8) binary package manager, rc.conf(5) for service startup configuration, and pf(4) as its primary packet filter. There is no SELinux or AppArmor — instead, FreeBSD provides the MAC (Mandatory Access Control) framework and Capsicum […]

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Common Problems 117612

Ubuntu 20.04 LTS NIC Missing After Kernel Module Update

🟠 High   ⏱ 5–30 min  Last verified: 21 August 2021 Affected versions: 20.04 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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How to Configure ZFS Pool Management on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Configure ZFS Pool Management 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 configure zfs pool management 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 […]

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How to Install and Configure BIND9 DNS Server on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Install and Configure BIND9 DNS Server on FreeBSD 13

Introduction How to Install and Configure BIND9 DNS Server on FreeBSD 13 is a core administration task for any FreeBSD 13 server operator. FreeBSD 13 ships with the 15.0-RELEASE kernel, ZFS as the default root filesystem, Capsicum capability sandboxing improvements, and an updated ports tree. Unlike Linux distributions, FreeBSD uses rc(8) for service management, pf […]

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How to Set Up Zabbix Agent on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Set Up Zabbix Agent on Windows Server 2012 R2

How to Set Up Zabbix Agent on Windows Server 2012 R2 Zabbix is a mature, enterprise-grade open-source monitoring platform that provides agent-based and agentless monitoring with built-in alerting, trending, dashboards, and auto-discovery. The Zabbix Agent 2 provides active and passive check modes, native Windows performance counter collection, event log monitoring, process monitoring, and support for […]

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How to Configure Database Connection Pooling with PgBouncer on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Configure Database Connection Pooling with PgBouncer on RHEL 8

PgBouncer is a lightweight connection pooler for PostgreSQL that sits between your application and the database server, reusing a small pool of backend connections across many client requests. Without a connection pooler, PostgreSQL must fork a new backend process for every client connection, consuming memory and CPU as connection counts grow. On RHEL 8, PgBouncer […]

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How to Monitor Nginx Logs with GoAccess on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Monitor Nginx Logs with GoAccess on FreeBSD 13

Introduction This guide explains how to Monitor Nginx Logs with GoAccess on FreeBSD 13 on FreeBSD 13. FreeBSD uses the pkg(8) binary package manager, rc.conf(5) for service startup configuration, and pf(4) as its primary packet filter. There is no SELinux or AppArmor — instead, FreeBSD provides the MAC (Mandatory Access Control) framework and Capsicum for […]

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