August 2019 - Page 40 of 69

Debian 9 — systemd — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 9

Debian 9 — systemd — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Debian 9 (stretch) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2018-16864 CVE-2019-3842 CVE-2019-6454 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 Connect Your Internet of Things with Node-RED on Ubuntu 16.04 — step-by-step Linux tutorial on Progressive Robot

How to Connect Your Internet of Things with Node-RED on Ubuntu 16.04

Node-RED is a switchboard for the Internet of Things, a visual tool that helps you connect your favorite apps, websites, and hardware together to do new and useful things. Node-RED has a powerful and flexible interface, and a large open source community creating *nodes* to interact with a wide variety of apps and services. In this tutorial, we’ll install Node.js and Node-RED, get an SSL certificate from Let’s Encrypt, and use Nginx to handle secure connections for Node-RED.

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How To Build a Discord Bot with Node.js — step-by-step Javascript tutorial on Progressive Robot

How To Build a Discord Bot with Node.js

Discord is a chat application that allows millions of users across the globe to message and voice chat online in communities called guilds or servers. In this tutorial, you will build a Discord bot from scratch, using Node.js and the Discord.js library, which allows users to directly interact with the Discord API. You’ll set up a profile for a Discord bot, get authentication tokens for the bot, and program the bot with the ability to process commands, with arguments, from users.

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Debian 10 — libwebp — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — libwebp — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2018-25009 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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An Introduction to JSON — step-by-step Javascript tutorial on Progressive Robot

An Introduction to JSON

JSON — short for JavaScript Object Notation — is a format for sharing data. As its name suggests, JSON is derived from the JavaScript programming language, but it’s available for use by many languages. This informational guide will get you up to speed with the data you can use in JSON files, and the general structure and syntax of this format.

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FreeBSD 12 — rubygem18-json — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — rubygem18-json — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: Ruby — Denial of Service and Unsafe Object Creation Vulnerability in JSON Related CVEs: CVE-2013-0269 Upstream summary: Aaron Patterson reports: When parsing certain JSON documents, the JSON gem can be […]

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Common Problems 118918

Ubuntu 14.04 LTS – apt update fails because dpkg lock is held

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Ubuntu 14.04 LTS Ubuntu 14.04 Ubuntu 14.04.6 📖 ~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 […]

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Common Problems 118454

Ubuntu 16.04 LTS high load average caused by I/O wait saturation

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: 16.04 📖 ~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 […]

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Common Problems 118417

Ubuntu 16.04 LTS SSH permission denied (publickey)

🟡 Medium   ⏱ 5–30 min  Last verified: 19 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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