Proxy

How to Configure Nginx as a Reverse Proxy on SLES 15 — step-by-step SUSE Linux Enterprise 15 tutorial on Progressive Robot

How to Configure Nginx as a Reverse Proxy on SLES 15

Introduction This tutorial covers How to Configure Nginx as a Reverse Proxy on SLES 15 on SLES 15. SLES 15 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Prerequisites Ensure your SLES 15 system is up to […]

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How to Install and Configure Caddy Web Server on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install and Configure Caddy Web Server on RHEL 7

How to Install and Configure Caddy Web Server on RHEL 7 Caddy is a modern, open-source web server written in Go that sets itself apart from traditional servers like Apache and Nginx through its automatic HTTPS provisioning, minimal configuration syntax, and zero-dependency binary distribution. On RHEL 7, where the standard repositories do not include Caddy, […]

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Common Problems 115393

RHEL 7 – Yum Metadata Corruption Blocks Security Updates

🟡 Medium   ⏱ 5–30 min  Last verified: 25 June 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 & Cross-Refs References & Further […]

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How to Install Zabbix Agent on Windows Server 2012 R2 for Monitoring — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Install Zabbix Agent on Windows Server 2012 R2 for Monitoring

How to Install Zabbix Agent on Windows Server 2012 R2 for Monitoring Zabbix is a widely deployed open-source monitoring platform that provides comprehensive monitoring for servers, applications, databases, and network devices. The Zabbix agent installed on Windows Server 2012 R2 collects system metrics, monitors services, checks log files for patterns, and executes custom checks, all […]

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Common Problems 118552

Ubuntu 16.04 Apache2 Fails to Start Because Port 80 Is In Use

🟡 Medium   ⏱ 5–30 min  Last verified: 17 June 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 & Cross-Refs References & Further […]

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How to Configure Nginx as a Reverse Proxy on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Configure Nginx as a Reverse Proxy on RHEL 8

Nginx is a high-performance web server that also excels as a reverse proxy, sitting in front of application servers and forwarding client requests to backend services running on internal ports. Using Nginx as a reverse proxy on RHEL 8 allows you to serve Node.js, Python, Java, or any HTTP-based application behind a clean public-facing endpoint […]

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How to Use Azure Monitor with Windows Server 2019 — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Use Azure Monitor with Windows Server 2019

Introduction to Azure Monitor for Windows Server 2019 Azure Monitor is Microsoft’s comprehensive monitoring service that collects, analyzes, and acts on telemetry data from Azure resources, on-premises servers, and hybrid environments. For Windows Server 2019 machines — whether on-premises, in Azure, or in other clouds — Azure Monitor can collect performance metrics, Windows Event Logs, […]

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Common Problems 117999

Ubuntu 18.04 LTS Failed to Fetch Repository Metadata

🟡 Medium   ⏱ 5–30 min  Last verified: 6 June 2019 Affected versions: 18.04 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 Install Jenkins on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Install Jenkins on Windows Server 2012 R2

How to Install Jenkins on Windows Server 2012 R2 Jenkins is one of the most widely adopted open-source automation servers in the industry, enabling organizations to build, test, and deploy software with repeatable, auditable pipelines. On Windows Server 2012 R2, Jenkins runs as a Windows service on top of the Java Runtime Environment, integrating naturally […]

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How to Configure SAML SSO with AD FS 3.0 on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Configure SAML SSO with AD FS 3.0 on Windows Server 2012 R2

How to Configure SAML SSO with AD FS 3.0 on Windows Server 2012 R2 Active Directory Federation Services 3.0 (AD FS 3.0), included with Windows Server 2012 R2, enables SAML 2.0 and WS-Federation based Single Sign-On for web applications and cloud services. Organizations use AD FS to federate their on-premises Active Directory identity to external […]

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