Ubuntu 22.04

How to Setup a MicroK8s Kubernetes Cluster on Ubuntu 22.04 — step-by-step Kubernetes tutorial on Progressive Robot

How to Setup a MicroK8s Kubernetes Cluster on Ubuntu 22.04

*The author selected Open Source Initiative to receive a donation as part of the Write for DOnations program.* Introduction to MicroK8s While many options are available for a Kubernetes cluster, not all follow a simple setup. MicroK8s, developed by Canonical, simplifies the Kubernetes cluster setup process through its single command binary installation and can be […]

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Common Problems 117072

Ubuntu 22.04 drops to initramfs on boot

🟡 Medium   ⏱ 5–30 min  Last verified: 2 October 2022 📖 ~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 22.04 — u-boot-nezha — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — u-boot-nezha — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 2 October 2022 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6523-1 Related CVEs: CVE-2022-30790 CVE-2022-30552 CVE-2022-2347 Upstream summary: It was discovered that U-Boot incorrectly handled certain USB DFU download setup packets. A local attacker could use this issue to cause […]

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Common Problems 116972

Ubuntu 22.04 external monitor not detected

🟡 Medium   ⏱ 5–30 min  Last verified: 1 October 2022 📖 ~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 117074

Ubuntu 22.04 LTS TLS Certificate Errors from Outdated CA Store

🟡 Medium   ⏱ 5–30 min  Last verified: 30 September 2022 📖 ~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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How To Upgrade to Ubuntu 22.04 Jammy Jellyfish — step-by-step Linux tutorial on Progressive Robot

How To Upgrade to Ubuntu 22.04 Jammy Jellyfish

The Ubuntu operating system’s latest Long Term Support (LTS) release, Ubuntu 22.04 (Focal Fossa), was released on April 21, 2020. This guide will explain how to upgrade an Ubuntu system of version 20.04 or later to Ubuntu 22.04.

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Ubuntu 22.04 — mozjs91 — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — mozjs91 — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 28 September 2022 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5494-1 Related CVEs: CVE-2022-28285 CVE-2022-31740 https://launchpad.net/bugs/1978961 https://launchpad.net/bugs/1976260 Upstream summary: It was discovered that SpiderMonkey JavaScript Library incorrectly generated certain assembly code. An remote attacker could possibly use this issue to […]

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Common Problems 116965

Ubuntu 22.04 LTS – Snap app fails to launch after refresh – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 28 September 2022 Affected versions: Ubuntu 22.04 LTS 📖 ~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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How To Manage Hashes in Redis — step-by-step Linux tutorial on Progressive Robot

How To Manage Hashes in Redis

A Redis hash is a data type that represents a mapping between a string field and a string value. A single hash can hold many field-value pairs and are designed to not take up much space, making them ideal for representing data objects. For example, a hash might represent a customer, and include fields like ‘name’, ‘address’, ’email’, or ‘customer_id’. This tutorial will go over how to manage hashes in Redis, from creating them to retrieving and deleting the data held within a hash.

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Common Problems 117007

Ubuntu 22.04 MySQL Startup Failure After InnoDB Log Size Change

🟡 Medium   ⏱ 5–30 min  Last verified: 27 September 2022 📖 ~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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