Storage Disk

How to Install ClamAV on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Install ClamAV on FreeBSD 12

Introduction FreeBSD 12 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up install clamav on freebsd 12 on FreeBSD 12 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 […]

Read more
How to Take ZFS Snapshots on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Take ZFS Snapshots on FreeBSD 13

Introduction How to Take ZFS Snapshots 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 for packet filtering, […]

Read more
How to Configure Redis Sentinel on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Configure Redis Sentinel on FreeBSD 13

Introduction This guide explains how to Configure Redis Sentinel 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 privilege […]

Read more
How to Configure Disk Quotas on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Configure Disk Quotas on FreeBSD 13 (FREEBSD-13-2)

Introduction How to Configure Disk Quotas 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 for packet filtering, […]

Read more
How to Configure Windows Server 2019 with Nagios — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Configure Windows Server 2019 with Nagios

How to Configure Windows Server 2019 with Nagios Nagios is a widely-used open-source infrastructure monitoring platform that can monitor Windows Server 2019 hosts for availability, performance, and service health. Integration is achieved through the NSClient++ agent installed on Windows servers, which responds to Nagios check commands over NRPE (Nagios Remote Plugin Executor) or NSCP protocol. […]

Read more
Common Problems 115003

RHEL 8 XFS filesystem remounts read-only after metadata error

🟡 Medium   ⏱ 5–30 min  Last verified: 9 January 2022 📖 ~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 […]

Read more
Common Problems 112629

Windows Server 2019 — VSS snapshot creation fails during backup windows — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 9 January 2022 Affected versions: Windows Server 2019 📖 ~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 […]

Read more
How to Configure Prometheus Node Exporter on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Configure Prometheus Node Exporter on FreeBSD 13

Introduction This guide explains how to Configure Prometheus Node Exporter 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 […]

Read more
Common Problems 118992

Ubuntu 14.04 LTS swap thrashing causes severe performance degradation

🟠 High   ⏱ 5–30 min  Last verified: 8 January 2022 Affected versions: 14.04 📖 ~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 […]

Read more
How to Configure Multipath I/O on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Configure Multipath I/O on CentOS Stream 9

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

Read more
CHAT