Backup Recovery

How to Set Up PostgreSQL Streaming Replication on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Set Up PostgreSQL Streaming Replication on FreeBSD 13

Introduction FreeBSD 13 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up set up postgresql streaming replication 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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Common Problems 119124

Ubuntu 14.04 LTS Docker Daemon Fails Due to cgroup Issues

🟡 Medium   ⏱ 5–30 min  Last verified: 17 August 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 Configure MySQL Primary-Replica Replication on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Configure MySQL Primary-Replica Replication on FreeBSD 13

Introduction Deploying configure mysql primary-replica replication on freebsd 13 on a FreeBSD 13 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the standard […]

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Common Problems 115110

Cockpit web console unreachable on RHEL 8

🟡 Medium   ⏱ 5–30 min  Last verified: 17 August 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 Back Up PostgreSQL with pg_dump and pg_basebackup on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Back Up PostgreSQL with pg_dump and pg_basebackup on RHEL 8

PostgreSQL provides two complementary tools for database backups: pg_dump and pg_basebackup. pg_dump takes logical backups of individual databases or selected objects and can restore to a different PostgreSQL version or host. pg_basebackup takes a physical, byte-for-byte copy of the entire data directory, which is the foundation of streaming replication and point-in-time recovery. This tutorial covers […]

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How to Configure OSPF with FRRouting on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Configure OSPF with FRRouting on FreeBSD 13

Introduction Deploying configure ospf with frrouting on freebsd 13 on a FreeBSD 13 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the standard […]

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Common Problems 117546

Ubuntu 20.04 File Permissions Broken After Recursive Chown

🟡 Medium   ⏱ 5–30 min  Last verified: 15 August 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 113094

Windows Server 2016 — AGDLP scaling breaks when global groups exceed forest replication threshold — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 15 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 Install Node.js on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Install Node.js on FreeBSD 13

Introduction How to Install Node.js on FreeBSD 13 is a core administration task for any FreeBSD 13 server operator. FreeBSD 13 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 packet filtering, and […]

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How to Configure Live Migration in Hyper-V on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Configure Live Migration in Hyper-V on Windows Server 2016

How to Configure Windows Server 2016 Live Migration Live Migration allows you to move running virtual machines from one Hyper-V host to another with zero downtime, making it essential for hardware maintenance, load balancing, and disaster recovery scenarios. Windows Server 2016 introduces several improvements to Live Migration, including compressed and SMB transport modes and virtual […]

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