Backup Recovery

How to Configure MariaDB Galera Cluster on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Configure MariaDB Galera Cluster on RHEL 8

MariaDB Galera Cluster is a synchronous multi-primary replication solution that allows writes to be accepted by any node in the cluster simultaneously. Unlike standard MySQL asynchronous replication, Galera ensures that a transaction is committed on all nodes before it is acknowledged to the application, eliminating replication lag and the risk of data loss during failover. […]

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Common Problems 120983

Debian 10: unattended-upgrades stuck and blocking apt

🟡 Medium   ⏱ 5–30 min  Last verified: 9 June 2020 Affected versions: Debian 10 📖 ~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 113525

Windows Server 2012 R2 — IPsec site-to-site tunnel renegotiation fails after certificate renewal on RRAS — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 9 June 2020 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 112978

Windows Server 2016 – Endpoint filter driver deadlock blocks file and network I/O – Fix and Prevention

🟠 High   ⏱ 5–30 min  Last verified: 9 June 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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How to Monitor ZFS Pool Health on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Monitor ZFS Pool Health on FreeBSD 12

Introduction This guide explains how to Monitor ZFS Pool Health 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 […]

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How to Configure Network Load Balancing on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Configure Network Load Balancing on Windows Server 2012 R2

How to Configure Network Load Balancing on Windows Server 2012 R2 Network Load Balancing (NLB) distributes incoming TCP/IP traffic across multiple servers in a cluster, providing both scalability and fault tolerance for stateless services such as web servers, terminal servers, and VPN endpoints. Unlike Failover Clustering, which is designed for stateful services with shared storage, […]

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How to Set Up FTP Server with vsftpd on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Set Up FTP Server with vsftpd on Debian 9

Introduction Deploying set up ftp server with vsftpd 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 […]

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How to Install Amanda Network Backup on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Install Amanda Network Backup on Debian 10

Introduction Deploying install amanda network backup 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 You will […]

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Common Problems 121579

Debian 9 SSH Public Key Authentication Fails

🟠 High   ⏱ 5–30 min  Last verified: 8 June 2020 Affected versions: Debian 9 📖 ~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 Manage Node.js Versions with nvm on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Manage Node.js Versions with nvm on Debian 10

Introduction Deploying manage node.js versions with nvm 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 Before […]

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