ubuntu

Common Problems 118466

Ubuntu 16.04 LTS – GRUB rescue prompt appears after update

🔴 Critical   ⏱ 5–30 min  Last verified: 17 August 2019 Affected versions: Ubuntu 16.04 LTS Ubuntu 16.04 Ubuntu 16.04.7 📖 ~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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How To Configure Apache Content Caching on Ubuntu 14.04 — step-by-step Linux tutorial on Progressive Robot

How To Configure Apache Content Caching on Ubuntu 14.04

Web caching is a method of improving server performance by allowing commonly requested content to be temporarily stored in a way that allows for faster access. This allows the visitor to access content faster without having to fetch the same data multiple times. By…

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How To Use Apache as a Reverse Proxy with mod_proxy on Ubuntu 16.04 — step-by-step Linux tutorial on Progressive Robot

How To Use Apache as a Reverse Proxy with mod_proxy on Ubuntu 16.04

In this tutorial, you will set up Apache as a reverse proxy using the `mod_proxy` extension to redirect incoming connections to underlying application server(s) running on the same network. There are instructions on setting up a simple web app using the Flask framework to show how Apache interacts with the real application hidden behind it, but you can also follow this tutorial using your existing application server, if you have one.

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Common Problems 118436

Ubuntu 16.04 LTS – DHCP lease does not renew on reboot

🟡 Medium   ⏱ 5–30 min  Last verified: 14 August 2019 Affected versions: Ubuntu 16.04 LTS Ubuntu 16.04 Ubuntu 16.04.7 📖 ~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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How to Connect Your Internet of Things with Node-RED on Ubuntu 16.04 — step-by-step Linux tutorial on Progressive Robot

How to Connect Your Internet of Things with Node-RED on Ubuntu 16.04

Node-RED is a switchboard for the Internet of Things, a visual tool that helps you connect your favorite apps, websites, and hardware together to do new and useful things. Node-RED has a powerful and flexible interface, and a large open source community creating *nodes* to interact with a wide variety of apps and services. In this tutorial, we’ll install Node.js and Node-RED, get an SSL certificate from Let’s Encrypt, and use Nginx to handle secure connections for Node-RED.

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Common Problems 118918

Ubuntu 14.04 LTS – apt update fails because dpkg lock is held

🟠 High   ⏱ 5–30 min  Last verified: 13 August 2019 Affected versions: Ubuntu 14.04 LTS Ubuntu 14.04 Ubuntu 14.04.6 📖 ~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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Common Problems 118454

Ubuntu 16.04 LTS high load average caused by I/O wait saturation

🟠 High   ⏱ 5–30 min  Last verified: 13 August 2019 Affected versions: 16.04 📖 ~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 […]

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