DNS

A Comparison of DNS Server Types:  How To Choose the Right DNS Configuration — step-by-step DevOps tutorial on Progressive Robot

A Comparison of DNS Server Types: How To Choose the Right DNS Configuration

DNS is a robust system that is absolutely essential in modern internet communication. Through a combination of delegation, redundancy, and caching, a client can receive the precise address of any of the system’s servers or sites by querying a complex network of computers for a simple name. In this article, we will discuss some of the different kinds of DNS servers that work together to make this possible. We will go over the advantages of each type and why you would choose one over another.

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Common Problems 118422

Ubuntu 16.04 DNS Resolution Fails Intermittently

🟡 Medium   ⏱ 5–30 min  Last verified: 23 February 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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How to Set Up System State Backup and Bare Metal Recovery on Windows Server 2019 — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Set Up System State Backup and Bare Metal Recovery on Windows Server 2019

Introduction to System State Backup and Bare Metal Recovery System State Backup and Bare Metal Recovery (BMR) are two of the most critical recovery capabilities for Windows Server 2019. A system state backup captures the minimal set of OS components required to recover a server’s role configuration: the Windows Registry, COM+ Class Registration Database, boot […]

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Common Problems 114964

RHEL 8 Root Filesystem Full on LVM-backed Server

🟡 Medium   ⏱ 5–30 min  Last verified: 22 February 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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How to Set Up Fluentd on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up Fluentd on Oracle Linux 8

Introduction Setting up set up fluentd on oracle linux 8 on a Oracle Linux 8 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Set Up Fluentd on Oracle Linux 8, with all the commands you need, the SELinux and firewalld considerations to keep in […]

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How to Install and Configure BIND9 DNS Server on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Install and Configure BIND9 DNS Server 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 and configure bind9 dns server 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 117495

GNOME Login Loop After Disk Full

🟠 High   ⏱ 5–30 min  Last verified: 21 February 2021 Affected versions: 20.04 📖 ~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 […]

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Common Problems 112503

Windows Server 2019 — BGP route flapping between edge peers and RRAS gateway impacts WAN stability — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 21 February 2021 Affected versions: Windows Server 2019 📖 ~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 Configure WireGuard VPN on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure WireGuard VPN on Oracle Linux 8

Introduction Oracle Linux 8 ships with a stable, security-hardened base that makes deploying configure wireguard vpn on oracle linux 8 both straightforward and auditable. This tutorial covers the complete procedure for how to Configure WireGuard VPN on Oracle Linux 8, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for […]

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How to Install MySQL 5.7 on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install MySQL 5.7 on Debian 9

Introduction Deploying install mysql 5.7 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 You will need […]

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