DNS

How to Install Python 3.11 on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Install Python 3.11 on FreeBSD 13

Introduction Deploying install python 3.11 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 base […]

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How to Install Jenkins on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Install Jenkins on CentOS Stream 9

Introduction This tutorial demonstrates how to Install Jenkins on CentOS Stream 9 on CentOS Stream 9. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered CentOS Stream 9 system with the default AppStream […]

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Debian 11 — libnet-dns-perl — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — libnet-dns-perl — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 5 January 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2007-3377 CVE-2007-3409 CVE-2007-6341 CVE-2008-1447 Upstream summary: Header.pm in Net::DNS before 0.60, a Perl module, (1) generates predictable sequence IDs with a fixed increment and (2) can use the […]

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Common Problems 114969

RHEL 8 – SELinux AVC Denial Blocks Custom Application Port

🟡 Medium   ⏱ 5–30 min  Last verified: 4 January 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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Common Problems 112397

Windows Server 2019 – Kernel crash loop after cumulative update – Fix and Prevention

🟠 High   ⏱ 5–30 min  Last verified: 4 January 2022 Affected versions: Windows Server 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 […]

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Common Problems 117599

Ubuntu 20.04 suspend and resume not working properly

🟡 Medium   ⏱ 5–30 min  Last verified: 3 January 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 Set Up TimescaleDB on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Set Up TimescaleDB on CentOS Stream 9

Introduction Setting up set up timescaledb on centos stream 9 on a CentOS Stream 9 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Set Up TimescaleDB on CentOS Stream 9, with all the commands you need, the SELinux and firewalld considerations to keep in […]

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Common Problems 114931

RHEL 8 NetworkManager DNS Resolution Intermittently Failing

🟡 Medium   ⏱ 5–30 min  Last verified: 3 January 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 Install InfluxDB and Telegraf on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install InfluxDB and Telegraf on RHEL 7

How to Install InfluxDB and Telegraf on RHEL 7 InfluxDB is a purpose-built time series database optimised for the high-write workloads that are typical in infrastructure monitoring, IoT data collection, and application performance tracking. Unlike general-purpose databases, InfluxDB stores measurements indexed by timestamp and tag values, enabling sub-millisecond queries across billions of data points. Telegraf […]

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Common Problems 118988

Ubuntu 14.04 LTS sudo Unable to Resolve Host on Every Command

🟡 Medium   ⏱ 5–30 min  Last verified: 2 January 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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