Linux

Common Problems 117993

Ubuntu 18.04 LTS MySQL service crash loop after configuration change

🟡 Medium   ⏱ 5–30 min  Last verified: 15 November 2020 📖 ~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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Gentoo Linux — sys-libs/kpmcore — vulnerability — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — sys-libs/kpmcore — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202011-03 Related CVEs: CVE-2020-27187 Upstream summary: Improper checks on the D-Bus request received resulted in improper protection for /etc/fstab. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick […]

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Common Problems 117430

Ubuntu 20.04 LTS DHCP Lease Not Renewing

🟡 Medium   ⏱ 5–30 min  Last verified: 15 November 2020 📖 ~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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Ubuntu 20.04 — node-thenify — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — node-thenify — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 November 2020 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6016-1 Related CVEs: CVE-2020-7677 Upstream summary: It was discovered that thenify incorrectly handled certain inputs. If a user or an automated system were tricked into opening a specially crafted input […]

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How To Use the PDO PHP Extension to Perform MySQL Transactions in PHP on Ubuntu 18.04 — step-by-step Linux tutorial on Progressive Robot

How To Use the PDO PHP Extension to Perform MySQL Transactions in PHP on Ubuntu 18.04

A MySQL transaction is a group of logically related SQL commands that are executed in the database as a single unit. Transactions are used to enforce ACID (Atomicity, Consistency, Isolation, and Durability compliance in an application. This is a set of standards that govern the reliability of processing operations in a database. In this tutorial, you will use the PDO PHP Extension, which provides an interface for working with databases in PHP, to perform MySQL transactions.

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How To Manage and Use MySQL Database Triggers on Ubuntu 18.04 — step-by-step Linux tutorial on Progressive Robot

How To Manage and Use MySQL Database Triggers on Ubuntu 18.04

In MySQL a trigger is a user-defined SQL command that is invoked automatically during an INSERT, DELETE, or UPDATE operation. The trigger code is associated with a table and is destroyed once a table is dropped. You can specify a trigger action time and set whether it will be activated before or after the defined database event. In this tutorial, you’ll create, use, and delete different types of triggers on your MySQL database.

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Debian 10 — chromium — multiple vulnerabilities (16 CVEs) — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — chromium — multiple vulnerabilities (16 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 15 November 2020 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-5869 CVE-2019-5805 CVE-2019-13723 CVE-2019-13725 CVE-2019-19880 CVE-2019-20503 CVE-2020-6510 CVE-2020-15995  +8 more Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – […]

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How To Install MediaWiki on Ubuntu 12.04 — step-by-step Linux tutorial on Progressive Robot

How To Install MediaWiki on Ubuntu 12.04

This tutorial describes how to install MediaWiki on Ubuntu 12.04, including the steps needed to set up a MySQL database and user. MediaWiki is a free open source wiki program that allows users to create their own personal wiki sites. Originally built for Wikpedia, MediaWiki is written in PHP and uses a backend database, like MySQL, to store its data.

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Oracle Linux 8 — python27:2.7 — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — python27:2.7 — security and stability fixes — required update (ELSA-2019-3335)

🟡 Medium   ⏱ 10–30 min  Last verified: 14 November 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-3335 Related CVEs: CVE-2019-6446 CVE-2019-9948 CVE-2019-11324 CVE-2019-9947 CVE-2019-9740 CVE-2019-11236 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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