Backup Recovery

Common Problems 118108

Ubuntu 18.04 Failed Automatic Security Upgrades from GPG Key Errors

🟡 Medium   ⏱ 5–30 min  Last verified: 29 January 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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How to Install ClickHouse on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Install ClickHouse on Debian 10

Introduction This guide explains how to Install ClickHouse on Debian 10 on Debian 10 Buster. Debian Buster uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 10 install with the standard repositories […]

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Common Problems 118087

Ubuntu 18.04 LTS – CA certificate trust chain errors break HTTPS endpoints – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 29 January 2020 Affected versions: Ubuntu 18.04 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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Common Problems 112556

Windows Server 2019 – Kernel nonpaged pool leak from third-party driver – Fix and Prevention

🟠 High   ⏱ 5–30 min  Last verified: 29 January 2020 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 […]

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How to Install Terraform on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Install Terraform on RHEL 8

Terraform by HashiCorp is the industry-standard tool for provisioning and managing infrastructure as code (IaC) across cloud providers, on-premises platforms, and SaaS APIs. On RHEL 8 you can install Terraform directly from the official HashiCorp RPM repository, keeping it up to date through the standard dnf package manager. This tutorial walks through adding the HashiCorp […]

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How to Set Up Jaeger Distributed Tracing on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Set Up Jaeger Distributed Tracing on Debian 10

Introduction Deploying set up jaeger distributed tracing 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 Ensure […]

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Common Problems 117973

Ubuntu 18.04 LTS NTP drift causes certificate and auth failures

🟡 Medium   ⏱ 5–30 min  Last verified: 27 January 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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How to Enable SSL/TLS with Let's Encrypt on Apache2 on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Enable SSL/TLS with Let’s Encrypt on Apache2 on Debian 10

Introduction Deploying enable ssl/tls with let’s encrypt on apache2 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. […]

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How to Set Up a Git Server with Gitea on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Set Up a Git Server with Gitea on RHEL 7

How to Set Up a Git Server with Gitea on RHEL 7 Gitea is a lightweight, self-hosted Git service written in Go. It provides a GitHub-style web interface for repository management, issue tracking, pull requests, webhooks, and user management — all from a single binary that consumes a fraction of the resources required by GitLab […]

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Common Problems 118458

Kernel Panic – not syncing: VFS

🟡 Medium   ⏱ 5–30 min  Last verified: 26 January 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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