ubuntu

Common Problems 117491

Ubuntu 20.04 LTS sudo Fails With PAM Authentication Error

🟠 High   ⏱ 5–30 min  Last verified: 4 June 2021 Affected versions: 20.04 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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What's New in Ubuntu 18.04 Bionic Beaver — step-by-step Linux tutorial on Progressive Robot

What’s New in Ubuntu 18.04 Bionic Beaver

The Ubuntu operating system’s most recent Long Term Support (LTS) release, version 18.04 (Bionic Beaver), was released on April 26, 2018. This guide is intended as a brief overview of new features and significant changes to Ubuntu Server since the previous LTS release, 16.04.

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How To Use LVM To Manage Storage Devices on Ubuntu 18.04 — step-by-step Linux tutorial on Progressive Robot

How To Use LVM To Manage Storage Devices on Ubuntu 18.04

LVM, or Logical Volume Management, is a storage device management technology that gives users the power to pool and abstract the physical layout of component storage devices for easier and flexible administration. In this guide, we will cover how to manage your storage devices with LVM. We will show you how to display information about volumes and potential targets, how to create and destroy volumes of various types, and how to modify existing volumes through resizing or transformation.

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Ubuntu 18.04 — linux-azure — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — linux-azure — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 3 June 2021 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4325-1 Related CVEs: CVE-2019-19046 CVE-2020-8428 CVE-2019-19053 CVE-2019-19056 CVE-2019-19058 CVE-2019-19059 CVE-2019-19066 CVE-2019-19068  +12 more Upstream summary: It was discovered that the IPMI message handler implementation in the Linux kernel did not […]

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Ubuntu 20.04 — xen — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — xen — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 3 June 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5617-1 Related CVEs: CVE-2020-0543 CVE-2020-11739 CVE-2020-11740 CVE-2020-11741 CVE-2020-11742 CVE-2020-11743 CVE-2020-15563 CVE-2020-15564  +12 more Upstream summary: It was discovered that memory contents previously stored in microarchitectural special registers after RDRAND, RDSEED, […]

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Common Problems 119062

Ubuntu 14.04 LTS UFW rule change accidentally blocks SSH

🔴 Critical   ⏱ 5–30 min  Last verified: 2 June 2021 Affected versions: 14.04 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 117561

Ubuntu 20.04 LTS – snapd refresh stuck and snap applications fail to update – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 2 June 2021 Affected versions: Ubuntu 20.04 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 16.04 — libspf2 — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — libspf2 — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 2 June 2021 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6584-2 Related CVEs: CVE-2021-33912 CVE-2021-33913 CVE-2021-20314 Upstream summary: USN-6584-1 fixed several vulnerabilities in Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. This update provides the corresponding updates for CVE-2021-33912 and CVE-2021-33913 […]

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Common Problems 117404

Ubuntu 20.04 LTS Unmet Dependencies After Partial Upgrade

🟡 Medium   ⏱ 5–30 min  Last verified: 1 June 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 […]

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