ubuntu

Common Problems 118057

Ubuntu 18.04 Nginx Fails to Start Due to Port 80 Conflict

🟡 Medium   ⏱ 5–30 min  Last verified: 22 July 2019 📖 ~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 118052

Ubuntu 18.04 LTS OpenSSL updates break legacy TLS clients

🟡 Medium   ⏱ 5–30 min  Last verified: 22 July 2019 📖 ~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 Elasticsearch 1.7, Logstash 1.5, and Kibana 4.1 (ELK Stack) on Ubuntu 14.04 — step-by-step Linux tutorial on Progressive Robot

How To Install Elasticsearch 1.7, Logstash 1.5, and Kibana 4.1 (ELK Stack) on Ubuntu 14.04

In this tutorial, we will go over the installation of a legacy version of Elasticsearch ELK Stack on Ubuntu 14.04—that is, Elasticsearch 1.7.3, Logstash 1.5.4, and Kibana 4.1.1. We will also show you how to configure it to gather and visualize the syslogs of your systems in a centralized location. Logstash is an open source tool for collecting, parsing, and storing logs for future use. Kibana is a web interface that can be used to search and view the logs that Logstash has indexed.

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Ubuntu 16.04 — kde4libs — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — kde4libs — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 20 July 2019 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4100-1 Related CVEs: CVE-2016-6232 CVE-2019-14744 Upstream summary: It was discovered that KConfig and KDE libraries have a vulnerability where an attacker could hide malicious code under desktop and configuration files. […]

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Common Problems 118009

Ubuntu 18.04 LTS GPG Key Expired for apt Repository

🟡 Medium   ⏱ 5–30 min  Last verified: 19 July 2019 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 Use the LESS CSS Preprocessor on an Ubuntu VPS — step-by-step Linux tutorial on Progressive Robot

How To Use the LESS CSS Preprocessor on an Ubuntu VPS

In this tutorial, we will see how you can install LESS and get started using it on the server-side. For this, it assumes you are already running your own VPS with Ubuntu and a web server installed on it if you want to see something in the browser (but not necessary at this level). Additionally, you will have to install Node.js and NPM (Node Package Manager).

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Common Problems 118603

Ubuntu 16.04 LTS – cron jobs stop running after timezone changes – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 18 July 2019 Affected versions: Ubuntu 16.04 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 117954

Ubuntu 18.04 high CPU usage from background indexing

🟡 Medium   ⏱ 5–30 min  Last verified: 18 July 2019 📖 ~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 16.04 — patch — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — patch — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 18 July 2019 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4071-1 Related CVEs: CVE-2019-13636 CVE-2019-13638 CVE-2016-10713 CVE-2018-1000156 CVE-2018-6951 Upstream summary: It was discovered that Patch incorrectly handled certain files. An attacker could possibly use this issue to access sensitive information. […]

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