Mail Services

How to Configure Postfix Mail Server on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Configure Postfix Mail 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 configure postfix mail 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 any Linux […]

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How to Configure SELinux on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Configure SELinux on RHEL 8

SELinux (Security-Enhanced Linux) is a mandatory access control (MAC) framework built into the Linux kernel and enabled by default on every RHEL 8 installation. Unlike discretionary access controls such as standard Unix permissions, SELinux enforces policy rules that confine processes to only the files, sockets, and capabilities they legitimately require, limiting the blast radius of […]

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How to Configure Scheduled Task-Based Backup Scripts on Windows Server 2022 — step-by-step Windows Server 2022 tutorial on Progressive Robot

How to Configure Scheduled Task-Based Backup Scripts on Windows Server 2022

Introduction to Scheduled Task-Based Backup Scripts on Windows Server 2022 Windows Server 2022 ships with powerful built-in tools for automating backup operations: PowerShell for scripting, the Task Scheduler for timed execution, robocopy for file-level data copies, and wbadmin for system image and system state backups. Combining these into well-structured backup scripts — complete with logging, […]

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How to Configure Storage Reports with FSRM on Windows Server 2022 — step-by-step Windows Server 2022 tutorial on Progressive Robot

How to Configure Storage Reports with FSRM on Windows Server 2022

Introduction to FSRM Storage Reports File Server Resource Manager (FSRM) includes a powerful Storage Reports module that enables administrators to generate detailed reports about disk usage, file activity, and quota compliance on Windows Server 2022. Storage Reports help you understand how storage is being consumed, identify waste, enforce compliance, and plan capacity. Reports can be […]

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Common Problems 111647

Windows Server 2022 — AD DS replication fails with error 1722 (RPC Server Unavailable) — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 26 November 2022 Affected versions: Windows Server 2022 📖 ~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 Set Up Active Directory Recycle Bin on Windows Server 2022 — step-by-step Windows Server 2022 tutorial on Progressive Robot

How to Set Up Active Directory Recycle Bin on Windows Server 2022

Managing AD Users and Groups with PowerShell PowerShell’s ActiveDirectory module provides a comprehensive set of cmdlets for creating, modifying, querying, and removing user and group objects in Active Directory. While the graphical ADUC console works well for one-off tasks, scripting with PowerShell is essential for bulk operations, consistent provisioning, and automation. On Windows Server 2022, […]

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How to Set Up a Build Server with MSBuild on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Set Up a Build Server with MSBuild on Windows Server 2012 R2

How to Set Up a Build Server with MSBuild on Windows Server 2012 R2 MSBuild (Microsoft Build Engine) is the foundational build system for .NET and C++ projects on the Windows platform. Setting up a dedicated MSBuild build server on Windows Server 2012 R2 enables your team to perform automated, reproducible builds of Visual Studio […]

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Common Problems 114569

Postfix Cannot Send Mail Due To DNS Or Relay Policy

🟡 Medium   ⏱ 5–30 min  Last verified: 22 October 2022 📖 ~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 Email with Sendmail on IBM AIX 7.3 — step-by-step IBM AIX 7.3 tutorial on Progressive Robot

How to Configure Email with Sendmail on IBM AIX 7.3

Introduction IBM AIX 7.3 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.3 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to configure email with sendmail on IBM AIX 7.3 with […]

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How to Set Up Grafana Alerting and Notification Channels on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Set Up Grafana Alerting and Notification Channels on RHEL 9

Grafana Unified Alerting, introduced in Grafana 9 and enabled by default in Grafana 10+, provides a centralised alerting engine that works across all data sources and replaces the older per-panel Legacy Alerting system. On RHEL 9, configuring Grafana alerting correctly means setting up contact points for notification delivery, building a notification policy routing tree that […]

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