Ubuntu 20.04

Ubuntu 20.04 — fossil — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — fossil — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 14 December 2020 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6770-1 Related CVEs: https://launchpad.net/bugs/2064509 Upstream summary: USN-6729-1 fixed vulnerabilities in Apache HTTP Server. The update lead to the discovery of a regression in Fossil with regards to the handling of […]

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Ubuntu 20.04にMySQLをインストールする方法 — step-by-step Linux tutorial on Progressive Robot

Ubuntu 20.04にMySQLをインストールする方法

MySQLは、人気のあるLAMP(Linux、Apache、MySQL、PHP/Python/Perl)スタックの一部として一般的にインストールされているオープンソースデータベース管理システムです。リレーショナルモデルを実装し、データを管理するためにSQL(Structured Query Language)を使用します。このチュートリアルでは、Ubuntu 20.04サーバーにMySQLをインストールする方法について説明します。

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Common Problems 117550

Ubuntu 20.04 LTS Sudo Access Unexpectedly Revoked

🟡 Medium   ⏱ 5–30 min  Last verified: 10 December 2020 📖 ~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 — hibagent — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — hibagent — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 10 December 2020 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6493-1 Related CVEs: https://launchpad.net/bugs/2043739 Upstream summary: On Ubuntu 20.04 LTS and Ubuntu 22.04 LTS, the hibagent package has been updated to add IMDSv2 support, as IMDSv1 uses an insecure protocol […]

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Common Problems 117621

Ubuntu 20.04 LTS – Certbot renewal fails because port 80 is in use – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 8 December 2020 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 117520

Ubuntu 20.04 LTS Throughput Drops on High Bandwidth Links

🟡 Medium   ⏱ 5–30 min  Last verified: 6 December 2020 📖 ~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 117406

Ubuntu 20.04 LTS – unattended-upgrades causes sustained CPU usage – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 5 December 2020 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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