chris

How to Configure Infrastructure as Code with Pulumi on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Configure Infrastructure as Code with Pulumi on RHEL 7

How to Configure Infrastructure as Code with Pulumi on RHEL 7 Infrastructure as Code (IaC) transforms manual cloud provisioning into version-controlled, repeatable programs. While tools like Terraform use a domain-specific language, Pulumi takes a different approach: you write infrastructure definitions in real general-purpose languages — Python, TypeScript, Go, or C# — giving you the full […]

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Debian 9 — znc — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 9

Debian 9 — znc — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 7 June 2019 Affected versions: Debian 9 (stretch) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2018-14055 CVE-2019-9917 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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Arch Linux — mosquitto — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — mosquitto — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-201810-1 Related CVEs: CVE-2018-12543 CVE-2017-9868 Upstream summary: Type: denial of service. Status: Fixed. Affected: 1.5.1-1. Fixed in: 1.5.3-1. Group: AVG-772. Table of contents Symptom & Impact Environment & Reproduction Root […]

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Debian 9 — simplesamlphp — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 9

Debian 9 — simplesamlphp — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 7 June 2019 Affected versions: Debian 9 (stretch) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2017-12867 CVE-2019-3465 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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How to Install Zabbix on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Install Zabbix on RHEL 8

Zabbix is a mature, enterprise-grade open-source monitoring platform capable of tracking availability, performance, and log data for thousands of hosts from a single server. It ships with auto-discovery, customizable triggers, rich alerting integrations, and a polished web interface. Installing Zabbix 6.x on RHEL 8 takes roughly thirty minutes and gives you production-ready monitoring backed by […]

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Common Problems 121554

Debian 9 – cron jobs stop running due to anacron or timer overlap

🟡 Medium   ⏱ 5–30 min  Last verified: 6 June 2019 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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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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