DNS

Common Problems 119156

unattended-upgrades Fails with Broken Dependencies on Ubuntu 14.04

🟡 Medium   ⏱ 5–30 min  Last verified: 4 September 2021 📖 ~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 112517

Windows Server 2019 – SMB Direct RDMA driver mismatch causes connection fallback – Fix and Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 4 September 2021 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 Harden Nginx: Security Headers, TLS 1.3 and OCSP Stapling on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Harden Nginx: Security Headers, TLS 1.3 and OCSP Stapling on RHEL 7

How to Harden Nginx: Security Headers, TLS 1.3 and OCSP Stapling on RHEL 7 A default Nginx installation exposes unnecessary information about the server software, accepts outdated and broken TLS protocol versions, and omits the HTTP security headers that modern browsers rely on for protection against cross-site scripting, clickjacking, and protocol downgrade attacks. Hardening Nginx […]

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Common Problems 125023

Oracle Linux 8 – Common Problem 006 – Diagnosis and Fix

🟡 Medium   ⏱ 5–30 min  Last verified: 3 September 2021 Affected versions: Oracle Linux 8 📖 ~3 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 Docker Compose on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Install Docker Compose on FreeBSD 12

Introduction This guide explains how to Install Docker Compose on FreeBSD 12 on FreeBSD 12. 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 […]

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Common Problems 117522

Ubuntu 20.04 LTS PostgreSQL Won’t Start After Crash Recovery

🟠 High   ⏱ 5–30 min  Last verified: 3 September 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 Test Disaster Recovery on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Test Disaster Recovery on Windows Server 2016

How to Perform Disaster Recovery Testing on Windows Server 2016 Disaster recovery testing is the practice of validating that your backup systems, failover processes, and recovery procedures actually work before you need them in a real emergency. An untested disaster recovery plan is little more than a document of good intentions. Organizations that skip regular […]

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Common Problems 112904

Windows Server 2016 — AD account repeatedly locked out moments after unlock — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 31 August 2021 Affected versions: Windows Server 2016 📖 ~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 Errors […]

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How To Use Dig, Whois, & Ping on an Ubuntu VPS to Query DNS Data — step-by-step Linux tutorial on Progressive Robot

How To Use Dig, Whois, & Ping on an Ubuntu VPS to Query DNS Data

Setting up domain names can be challenging for those who are inexperienced. The “dig” command can help verify that your domain settings are correct. This is also helpful for investigating how other websites set up their domain records. This guide will introduce the basics of how to query information with dig. It will also briefly explore the “ping” and “whois” commands.

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How to Install Vault for Secrets Management on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Install Vault for Secrets Management on FreeBSD 13 (FREEBSD-13-2)

Introduction FreeBSD 13 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up install vault for secrets 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 […]

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