Ubuntu 22.04

Common Problems 116948

Ubuntu 22.04 LTS – temporary failure resolving hostnames breaks updates – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 4 November 2022 Affected versions: Ubuntu 22.04 LTS (Jammy) 📖 ~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 […]

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Common Problems 116955

Ubuntu 22.04 LTS – Cloud-init overwrites netplan on reboot – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 3 November 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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Ubuntu 22.04 — calamares-settings-ubuntu — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — calamares-settings-ubuntu — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 3 November 2022 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6106-1 Related CVEs: https://launchpad.net/bugs/2016436 Upstream summary: It was discovered that calamares-settings-ubuntu allowed creating the first user with a blank password, contrary to expectations. Table of contents Symptom & Impact Environment […]

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Common Problems 116894

Ubuntu 22.04 LTS – APT lock file blocks package operations – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 2 November 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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Ubuntu 22.04 — golang-golang-x-text — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — golang-golang-x-text — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 2 November 2022 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5873-1 Related CVEs: CVE-2020-14040 CVE-2020-28851 CVE-2020-28852 CVE-2021-38561 CVE-2022-32149 Upstream summary: It was discovered that Go Text incorrectly handled certain encodings. An attacker could possibly use this issue to cause a […]

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Common Problems 117133

Ubuntu 22.04 LTS – locale misconfiguration triggers Perl warnings in automation jobs – Fix & Prevention

🟢 Low   ⏱ 5–30 min  Last verified: 1 November 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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Common Problems 117125

Ubuntu 22.04 LTS – Swap disabled causing OOM kills under load – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 31 October 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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Ubuntu 22.04 — libmobi — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — libmobi — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 31 October 2022 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7638-1 Related CVEs: CVE-2022-29788 CVE-2022-1907 CVE-2022-1908 Upstream summary: It was discovered that Libmobi did not correctly handle certain memory operations, which could lead to a buffer overflow. A local attacker […]

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How To Set Up WireGuard on Ubuntu 22.04 — step-by-step Linux tutorial on Progressive Robot

How To Set Up WireGuard on Ubuntu 22.04

In this tutorial, you will set up WireGuard on an Ubuntu 22.04 server, and then configure another machine to connect to it as a peer using both IPv4 and IPv6 connections (commonly referred to as a _dual stack_ connection). You’ll also learn how to route the peer’s Internet traffic through the WireGuard server in a gateway configuration, in addition to using the VPN for an encrypted peer-to-peer tunnel.

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How To Install and Configure Postfix on Ubuntu 22.04 — step-by-step Linux tutorial on Progressive Robot

How To Install and Configure Postfix on Ubuntu 22.04

Postfix is a popular open-source Mail Transfer Agent (MTA) that can be used to route and deliver email on a Linux system. It is estimated that around 25% of public mail servers on the internet run Postfix. In this guide, you’ll learn how to install and configure Postfix on an Ubuntu 22.04 server.

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