June 2020 - Page 23 of 66

Common Problems 124146

Python Virtual Environment Breaks After System Python Update

🟡 Medium   ⏱ 5–30 min  Last verified: 20 May 2026 Affected versions: Oracle Linux 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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Alpine Linux edge — nsd — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — nsd — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 4.3.4-r0 📖 ~4 min read  •  Source: Alpine secdb entry — nsd 4.3.4-r0 Related CVEs: CVE-2020-28935 Upstream summary: Alpine main repository for vedge ships nsd 4.3.4-r0 which addresses CVE-2020-28935. Table of contents Symptom & Impact Environment […]

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Common Problems 116118

AppArmor profile prevents backup agent snapshot operation

🟡 Medium   ⏱ 5–30 min  Last verified: 20 May 2026 Affected versions: Ubuntu 26.04 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 115025

sudo Broken by Invalid sudoers Entry

🟡 Medium   ⏱ 5–30 min  Last verified: 20 May 2026 📖 ~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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Arch Linux — ruby-bundler — vulnerability — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — ruby-bundler — vulnerability — 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-202106-14 Related CVEs: CVE-2020-36327 Upstream summary: Type: insufficient validation. Status: Fixed. Affected: 2.2.17-1. Fixed in: 2.2.18-1. Group: AVG-1891. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis […]

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Common Problems 114593

RHEL 9 dnf download failures behind enterprise proxy

🟡 Medium   ⏱ 5–30 min  Last verified: 20 May 2026 📖 ~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 Telegraf Metrics Agent on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure Telegraf Metrics Agent on Debian 10

Introduction Deploying configure telegraf metrics agent on debian 10 on a Debian 10 Buster machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites You will […]

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Common Problems 113613

Windows Server 2012 R2 — Firewall profile switches to Public and blocks domain traffic — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 30 May 2026 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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Spring Restful Web Services Example with JSON, Jackson and Client Program — step-by-step DevOps tutorial on Progressive Robot

Spring Restful Web Services Example with JSON, Jackson and Client Program

URL: https://www.progressiverobot.com/spring-rest-example-tutorial-spring-restful-web-services/ Spring is one of the most widely used Java EE frameworks. We have earlier seen how to use [Spring MVC](/community/tutorials/spring-mvc-tutorial "Spring MVC Tutorial for Beginners with Spring Tool Suite") to create Java-based web applications. Today we will learn to create Spring Restful Web Services using Spring MVC and then test it out with […]

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