Backup Recovery

Common Problems 119080

Ubuntu 14.04 LTS UFW Rules Lost After Interface Renaming

🟠 High   ⏱ 5–30 min  Last verified: 15 February 2020 Affected versions: 14.04 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 Set Up iocage Jail Storage on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Set Up iocage Jail Storage on FreeBSD 12

Introduction How to Set Up iocage Jail Storage 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 […]

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Common Problems 118403

Ubuntu 16.04 LTS – unattended-upgrades causes sustained CPU usage – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 15 February 2020 Affected versions: Ubuntu 16.04 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 Install and Configure ISC DHCP Server on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Install and Configure ISC DHCP Server on Debian 10

Introduction Deploying install and configure isc dhcp server on debian 10 on a Debian 10 Buster 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 […]

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Common Problems 118602

Ubuntu 16.04 LTS – MySQL service fails to start due to InnoDB corruption – Fix & Prevention

🔴 Critical   ⏱ 5–30 min  Last verified: 14 February 2020 Affected versions: Ubuntu 16.04 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 Set Up Grafana Alerting on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Set Up Grafana Alerting 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 grafana alerting 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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How to Install PHP 7.0 with PHP-FPM on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install PHP 7.0 with PHP-FPM on Debian 9

Introduction Deploying install php 7.0 with php-fpm on debian 9 on a Debian 9 Stretch 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 Ensure […]

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How to Configure GPG Key Management on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure GPG Key Management on Debian 10

Introduction How to Configure GPG Key Management on Debian 10 is a fundamental operation for any administrator maintaining a Debian 10 Buster server. Debian 10 Buster 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 10. […]

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Common Problems 115427

systemctl Shows Service Failed After Package Upgrade

🟡 Medium   ⏱ 5–30 min  Last verified: 13 February 2020 📖 ~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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Common Problems 113131

Windows Server 2016 — Patch Compliance Drift Caused by Disabled UsoSvc and WaaSMedic — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 13 February 2020 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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