Abstract Factory Design Pattern in Java

February 14, 2021
Programming
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Welcome to Abstract Factory Design Pattern in java example. Abstract Factory design pattern is one of the Creational patterns. Abstract Factory pattern is almost similar to [Factory Pattern](/community/tutorials/factory-design-pattern-in-java) except the fact that its more like factory of factories. Abstract Factory ![abstract factory, abstract factory design pattern, abstract factory pattern](images/abstract-factory-design-pattern-in-java-section-1.png) If you are familiar with [factory […]

Oracle Linux 8 — Updating libss Package Might Fail if libss-devel Package Is Installed

February 13, 2021
Linux
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🟠 High ⏱ 5–30 min Last verified: 13 February 2021 Affected versions: Oracle Linux 8 📖 ~4 min read • Source: Oracle Bug 32005190 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 […]

Ubuntu 14.04 LTS Python pip SSL Errors During Install

February 13, 2021
Linux
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🟡 Medium ⏱ 5–30 min Last verified: 13 February 2021 📖 ~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 […]

Ubuntu 14.04 LTS boot drops to initramfs after abrupt power loss

February 13, 2021
Linux
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🟠 High ⏱ 5–30 min Last verified: 13 February 2021 Affected versions: 14.04 📖 ~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 […]

Alpine Linux edge — alpine — multiple vulnerabilities (2 CVEs) — patch and remediation guide

February 13, 2021
Linux
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🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 2.25-r0 📖 ~4 min read • Source: Alpine secdb entry — alpine 2.25-r0 Related CVEs: CVE-2021-38370 CVE-2020-14929 Upstream summary: Alpine community repository for vedge ships alpine 2.25-r0 which addresses CVE-2021-38370. Table of contents Symptom & Impact […]

Ubuntu 20.04 printer not printing or stuck in queue

February 13, 2021
Linux
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🟡 Medium ⏱ 5–30 min Last verified: 13 February 2021 📖 ~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 […]

RHEL 7 – MariaDB Fails to Start Due to SELinux Boolean Misconfiguration

February 13, 2021
Linux
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🟡 Medium ⏱ 5–30 min Last verified: 13 February 2021 📖 ~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 […]

How to Set Up a Network Bridge on Oracle Linux 8

February 13, 2021
Oracle Linux
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Introduction Oracle Linux 8 ships with a stable, security-hardened base that makes deploying set up a network bridge on oracle linux 8 both straightforward and auditable. This tutorial covers the complete procedure for how to Set Up a Network Bridge on Oracle Linux 8, including dnf module streams where applicable, systemd unit management, and the […]

Windows Server 2012 R2 — DNS scavenging removes active records due to aging configuration drift in AD-integrated zones — Fix & Prevention

February 13, 2021
Tutorials
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🟠 High ⏱ 5–30 min Last verified: 13 February 2021 Affected versions: Windows Server 2012 R2 📖 ~2 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 […]

Python KeyError Exception Handling Examples

February 13, 2021
Python
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URL: https://www.progressiverobot.com/python-keyerror-exception-handling-examples/ 1. What is Python KeyError Exception? Python KeyError is raised when we try to access a key from dict, which doesn't exist. It's one of the built-in exception classes and raised by many modules that work with dict or objects having key-value pairs. 2. Python KeyError with Dictionary Let's look at a simple […]

Abstract Factory Design Pattern in Java

Oracle Linux 8 — Updating libss Package Might Fail if libss-devel Package Is Installed

Ubuntu 14.04 LTS Python pip SSL Errors During Install

Ubuntu 14.04 LTS boot drops to initramfs after abrupt power loss

Alpine Linux edge — alpine — multiple vulnerabilities (2 CVEs) — patch and remediation guide

Ubuntu 20.04 printer not printing or stuck in queue

RHEL 7 – MariaDB Fails to Start Due to SELinux Boolean Misconfiguration

How to Set Up a Network Bridge on Oracle Linux 8

Windows Server 2012 R2 — DNS scavenging removes active records due to aging configuration drift in AD-integrated zones — Fix & Prevention

Python KeyError Exception Handling Examples

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2021 - Page 670 of 759

Abstract Factory Design Pattern in Java

Oracle Linux 8 — Updating libss Package Might Fail if libss-devel Package Is Installed

Ubuntu 14.04 LTS Python pip SSL Errors During Install

Ubuntu 14.04 LTS boot drops to initramfs after abrupt power loss

Alpine Linux edge — alpine — multiple vulnerabilities (2 CVEs) — patch and remediation guide

Ubuntu 20.04 printer not printing or stuck in queue

RHEL 7 – MariaDB Fails to Start Due to SELinux Boolean Misconfiguration

How to Set Up a Network Bridge on Oracle Linux 8

Windows Server 2012 R2 — DNS scavenging removes active records due to aging configuration drift in AD-integrated zones — Fix & Prevention

Python KeyError Exception Handling Examples

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