Linux

Common Problems 117398

Ubuntu 20.04 LTS – apt update fails because dpkg lock is held

🟠 High   ⏱ 5–30 min  Last verified: 15 January 2021 Affected versions: Ubuntu 20.04 LTS Ubuntu 20.04 Ubuntu 20.04.6 📖 ~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 115459

RHEL 7 NetworkManager overwriting static ifcfg network settings

🟡 Medium   ⏱ 5–30 min  Last verified: 15 January 2021 Affected versions: RHEL 7 📖 ~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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Arch Linux — ansible — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — ansible — multiple vulnerabilities (3 CVEs) — 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-202102-9 Related CVEs: CVE-2021-20191 CVE-2021-20180 CVE-2021-20178 Upstream summary: Type: information disclosure. Status: Fixed. Affected: 2.10.5-1. Fixed in: 2.10.7-1. Group: AVG-1437. Table of contents Symptom & Impact Environment & Reproduction Root […]

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Installing WordPress on Ajenti V — step-by-step Linux tutorial on Progressive Robot

Installing WordPress on Ajenti V

Ajenti is an open source, web-based control panel that can be used for a large variety of server management tasks. In this tutorial we will install a WordPress blog, using the tools Ajenti V provides.

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How To Use kpcli To Manage KeePass2 Password Files on an Ubuntu 14.04 Server — step-by-step Linux tutorial on Progressive Robot

How To Use kpcli To Manage KeePass2 Password Files on an Ubuntu 14.04 Server

Using a password manager allows you to create and keep track of complex passwords for your various accounts, which allows you to implement better security practices easier. KeePass2 is a piece of software that lets you create your own password database files for managing this information. In this guide, we’ll look at a tool called `kpcli` which will allow you to create and manipulate KeePass2 database files in a server environment from the command line.

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Gentoo Linux — sys-cluster/pacemaker — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — sys-cluster/pacemaker — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202309-09 Related CVEs: CVE-2018-16877 CVE-2018-16878 CVE-2019-3885 CVE-2020-25654 Upstream summary: Multiple vulnerabilities have been discovered in Pacemaker. Please review the CVE identifiers referenced below for details. Table of contents Symptom & Impact Environment […]

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Oracle Linux 8 — qt5-qtbase — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — qt5-qtbase — security and stability fixes — required update (ELSA-2021-1756)

🟡 Medium   ⏱ 10–30 min  Last verified: 14 January 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-1756 Related CVEs: CVE-2020-17507 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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Common Problems 115546

RHEL 7 journalctl Vacuum Not Configured in Long-Running Hosts

🟢 Low   ⏱ 5–30 min  Last verified: 14 January 2021 Affected versions: RHEL 7 📖 ~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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