ubuntu

Ubuntu 20.04 — ca-certificates — multiple vulnerabilities (8 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — ca-certificates — multiple vulnerabilities (8 CVEs) — patch and remediation guide

  • April 19, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7034-1 Related CVEs: https://launchpad.net/bugs/2081875 https://launchpad.net/bugs/2020089 https://launchpad.net/bugs/1998785 https://launchpad.net/bugs/1976631 https://launchpad.net/bugs/1944481 https://launchpad.net/bugs/1914064 https://launchpad.net/bugs/1900727 https://launchpad.net/bugs/1881533 Upstream summary: The ca-certificates package contained outdated CA certificates. This update refreshes the included certificates to those contained in […]

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How To Use Ansible to Install and Set Up WordPress with LAMP on Ubuntu 18.04 — step-by-step Linux tutorial on Progressive Robot

How To Use Ansible to Install and Set Up WordPress with LAMP on Ubuntu 18.04

  • April 18, 2021
  • Linux
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This guide explains how to use Ansible to automate the steps contained in our guide on How To Install WordPress with LAMP on Ubuntu 18.04. WordPress is the most popular CMS (content management system) on the internet, allowing users to set up flexible blogs and websites on top of a MySQL backend with PHP processing. After setup, almost all administration can be done through the web frontend.

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Ubuntu 16.04 — dojo — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — dojo — multiple vulnerabilities (4 CVEs) — patch and remediation guide

  • April 18, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7569-1 Related CVEs: CVE-2021-23450 CVE-2020-4051 CVE-2019-10785 CVE-2018-15494 Upstream summary: It was discovered that Dojo did not correctly handle DataGrids. An attacker could possibly use this issue to execute arbitrary code. […]

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How To Install Matrix Synapse on Ubuntu 16.04 — step-by-step Linux tutorial on Progressive Robot

How To Install Matrix Synapse on Ubuntu 16.04

  • April 17, 2021
  • Linux
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Matrix is an open standard for decentralized communication. Matrix uses homeservers to store your account information and chat history. By following this guide you will install Synapse, the reference homeserver implementation of Matrix. When you’re finished, you will be able to connect to your homeserver via any Matrix client and communicate with others users across other Matrix federated homeservers.

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Common Problems 117556

Ubuntu 20.04 Pip SSL Certificate Verification Errors

  • April 16, 2021
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 16 April 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 118079

Ubuntu 18.04 LTS UFW Rules Not Applied as Expected

  • April 15, 2021
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 15 April 2021 Affected versions: 18.04 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 Install MySQL on Ubuntu 16.04 — step-by-step Linux tutorial on Progressive Robot

How To Install MySQL on Ubuntu 16.04

  • April 15, 2021
  • Linux
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MySQL is an open-source database management system, commonly installed as part of the popular LAMP (Linux, Apache, MySQL, PHP/Python/Perl) stack. It uses a relational database and SQL (Structured Query Language) to manage its data.

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