February 2021 - Page 54 of 62

Common Problems 118968

Ubuntu 14.04 LTS NTP Drift Causes TLS and Authentication Failures

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 đź“– ~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 118049

Ubuntu 18.04 LTS MySQL Refuses to Start After Crash Recovery

đźź  High   ⏱ 5–30 min  Last verified: 20 May 2026 Affected versions: 18.04 LTS đź“– ~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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Secrets to Building and Scaling SRE Teams — step-by-step DevOps tutorial on Progressive Robot

Secrets to Building and Scaling SRE Teams

Tammy Bryant, Principal SRE at Gremlin, shares how she’s built tech solutions in emerging ecosystems. From setting yourself up for success as you scale to efficiently handling millions of global users, Bryant shares her best advice for onboarding all customers, no matter what stage your business is in.

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Gentoo Linux — www-apps/zeppelin-bin — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — www-apps/zeppelin-bin — multiple vulnerabilities (3 CVEs) — patch and remediation guide

đźź  High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux đź“– ~4 min read  â€˘  Source: Gentoo GLSA GLSA-202311-04 Related CVEs: CVE-2019-10095 CVE-2020-13929 CVE-2021-27578 Upstream summary: Multiple vulnerabilities have been discovered in Zeppelin. Please review the CVE identifiers referenced below for details. Table of contents Symptom & Impact Environment & […]

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How to Set Up Fluentd on SLES 12 — step-by-step SUSE Linux Enterprise 12 tutorial on Progressive Robot

How to Set Up Fluentd on SLES 12

Introduction This tutorial covers How to Set Up Fluentd on SLES 12 on SLES 12. SLES 12 (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 12 system is up to date: zypper refresh […]

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JUnit HTML Report — step-by-step Programming tutorial on Progressive Robot

JUnit HTML Report

URL: https://www.progressiverobot.com/junit-html-report/ When we configure maven-surefire-plugin to run our JUnit tests, it generates surefire-reports directory. This directory contains a txt file and an XML file for every test class. However, reading these files is not easy and it's also not easily explainable to a non-techie person. JUnit HTML Report We can use maven-surefire-report-plugin plugin to […]

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How To Write and Run Your First Program in Node.js — step-by-step Javascript tutorial on Progressive Robot

How To Write and Run Your First Program in Node.js

Node.js is a popular open-source runtime environment that can execute JavaScript outside of the browser using the V8 JavaScript engine, which is the same engine used to power the Google Chrome web browser’s JavaScript execution. In this tutorial you’ll create your first program with the Node.js runtime. You’ll be introduced to a few Node-specific concepts and build your way up to create a program that helps users inspect environment variables on their system.

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Ubuntu 20.04 — apt — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — apt — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Ubuntu 20.04 (focal) đź“– ~4 min read  â€˘  Source: Ubuntu Security Notice USN-4667-1 Related CVEs: CVE-2020-27350 CVE-2020-3810 Upstream summary: Kevin Backhouse discovered that APT incorrectly handled certain packages. A local attacker could possibly use this issue to cause APT to crash or […]

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