DNS

How to Set Up Grafana Alerting on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Set Up Grafana Alerting on FreeBSD 13

Introduction How to Set Up Grafana Alerting 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 […]

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How to Use Prometheus Blackbox Exporter for Endpoint Monitoring on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Use Prometheus Blackbox Exporter for Endpoint Monitoring on RHEL 7

How to Use Prometheus Blackbox Exporter for Endpoint Monitoring on RHEL 7 The Prometheus Blackbox Exporter probes external endpoints over HTTP, HTTPS, TCP, ICMP, and DNS from the perspective of an outside caller, making it an essential complement to node-level metrics collected by Node Exporter. While Node Exporter tells you about CPU load and memory […]

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How to Configure Nginx FastCGI Caching on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Configure Nginx FastCGI Caching on FreeBSD 13

Introduction How to Configure Nginx FastCGI Caching 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 […]

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Debian 11 — ruby-bindata — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — ruby-bindata — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 27 September 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-32823 Upstream summary: In the bindata RubyGem before version 2.4.10 there is a potential denial-of-service vulnerability. In affected versions it is very slow for certain classes in BinData […]

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Common Problems 121704

Debian 9 – rsync backup job fails on permissions, ACLs, or xattrs

🟠 High   ⏱ 5–30 min  Last verified: 26 September 2021 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 Install Memcached on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Install Memcached on FreeBSD 13

Introduction This guide explains how to Install Memcached on FreeBSD 13 on FreeBSD 13. 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 privilege separation. […]

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Common Problems 113519

Windows Server 2012 R2 – IIS Windows Authentication Negotiate failing after binding changes – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 26 September 2021 Affected versions: Windows Server 2012 R2 📖 ~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 […]

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Common Problems 117532

Ubuntu 20.04 LTS Cloud-Init Rewrites Network on Reboot

🟡 Medium   ⏱ 5–30 min  Last verified: 25 September 2021 Affected versions: 20.04 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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Common Problems 121051

Clock Drift Causes TLS and Job Scheduling Issues

🟡 Medium   ⏱ 5–30 min  Last verified: 24 September 2021 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 117419

Ubuntu 20.04 Bluetooth device not detected

🟡 Medium   ⏱ 5–30 min  Last verified: 24 September 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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