Backup Recovery

How to Configure PostgreSQL Remote Access on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Configure PostgreSQL Remote Access on FreeBSD 12

Introduction How to Configure PostgreSQL Remote Access on FreeBSD 12 is a core administration task for any FreeBSD 12 server operator. FreeBSD 12 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 […]

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How to Set Up a Ceph Storage Cluster on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Set Up a Ceph Storage Cluster on RHEL 8

Ceph is a unified, distributed storage system that simultaneously provides object, block, and file storage on commodity hardware. It eliminates single points of failure through replication and erasure coding, and scales linearly by adding nodes. The cephadm tool, introduced in Ceph Octopus, simplifies cluster deployment by using containers (Podman on RHEL 8) to manage Ceph […]

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Common Problems 113031

Windows Server 2016 — Cluster-Aware Updating Run Fails Mid-Wave During Cumulative Patch — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 28 June 2019 Affected versions: Windows Server 2016 📖 ~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 Set Up BGP Routing with BIRD on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Set Up BGP Routing with BIRD 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 set up bgp routing with bird 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 […]

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Common Problems 115449

RHEL 7 yum dependency conflict after enabling mixed repositories

🟠 High   ⏱ 5–30 min  Last verified: 27 June 2019 Affected versions: RHEL 7 📖 ~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 119111

Ubuntu 14.04 LTS failed unattended upgrades leave security patches unapplied

🟠 High   ⏱ 5–30 min  Last verified: 26 June 2019 Affected versions: 14.04 14.04.6 📖 ~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 113545

Windows Server 2012 R2 — NLB cluster convergence loops after adding new node with mismatched host priority — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 26 June 2019 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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Common Problems 112921

Windows Server 2016 — WSUS Scan Returns 0x8024401c Timeout During Patch Cycle — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 26 June 2019 Affected versions: Windows Server 2016 📖 ~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 Set Up GitLab Runner on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Set Up GitLab Runner 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 set up gitlab runner 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 […]

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Common Problems 115393

RHEL 7 – Yum Metadata Corruption Blocks Security Updates

🟡 Medium   ⏱ 5–30 min  Last verified: 25 June 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 & Cross-Refs References & Further […]

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