Ubuntu 20.04

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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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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How To Install Matomo Web Analytics on Ubuntu 20.04 — step-by-step Docker tutorial on Progressive Robot

How To Install Matomo Web Analytics on Ubuntu 20.04

Matomo is an open-source, self-hosted web analytics application written in PHP. In this tutorial you will install Matomo and a MariaDB database using Docker Compose, then install Nginx to act as a reverse proxy for the Matomo app. Finally, you will enable secure HTTPS connections by using Certbot to download and configure SSL certificates from the Let’s Encrypt Certificate Authority.

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Common Problems 117466

Ubuntu 20.04 Black Screen After Login With NVIDIA

🟡 Medium   ⏱ 5–30 min  Last verified: 30 May 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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Common Problems 117496

Ubuntu 20.04 Suspend and Resume Failures

🟡 Medium   ⏱ 5–30 min  Last verified: 29 May 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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Ubuntu 20.04 — openssl-ibmca — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — openssl-ibmca — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 28 May 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6046-1 Related CVEs: https://launchpad.net/bugs/2015454 Upstream summary: It was discovered that OpenSSL-ibmca incorrectly handled certain RSA decryption. An attacker could possibly use this issue to expose sensitive information. Table of contents […]

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Common Problems 117518

Ubuntu 20.04 LTS – SSH login fails with Permission denied (publickey)

🟠 High   ⏱ 5–30 min  Last verified: 27 May 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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