Welcome to my blog. This is mainly about IT, information management and Cyber Security with occasional forays into general technology, science and maybe even politics and beliefs.
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Latest posts and knowledgebase articles
The COVID-19 crisis has meant many more people working from home. From long experience with this kind of working, here are some hints and tips to help.
Just as there are several possible ways to run Node-RED, there are several ways to access the log.
There are several possible ways to install Node-RED, this post provides an overview and some thoughts about when you might want to use which approach.
📖 Posts | 📎 Information Management, Data, Development, Software | 🔖 databases, dates, dba, debugging, development, software, solutions architecture, standards, timestamps
Dates and times are incredibly complex. They can be different in different countries, languages. They are often inconsistent and have weird edge-cases. These are some basic rules I apply when working with dates and times.
There are all sorts of reasons to want to run more than a single instance of Node-RED and several ways to do it.
For those not used to it, the terminology used in Node-RED can occasionally be confusing. Due in part to the overloading of some terms. So I’ve come up with this glossary to help keep myself from getting confused.
There are usually many ways to achieve something in Node-RED. A common question is whether or when to use a function node or a collection of core nodes to achieve an outcome.
JSONata is a syntax designed by IBM to help reformat and restructure JSON data in a similar vein to the way that XLST is used to transform XML data.
Node-RED’s admin UI has a built-in notification (toast) pop-up message feature. This article explains how to use it when creating custom nodes as it isn’t currently well documented.
Node-RED uses npm to manage package installations such as its nodes. Sometimes, you can get into a situation where you start getting lots of npm installation or removal issues and it feels like you are going round in circles trying to fix things. If so, time to call it a day and to get drastic! Here, I try to explain an easy way to fix things quickly and completely without side effects.
Node-RED is a powerful platform for prototyping and rapid development but it is complex. It has a lot of moving parts and it can be hard to know what might be causing performance bottlenecks. This article tries to give some hints and tips about analysing those bottlenecks and how to resolve them.
Node-RED allows us to create custom nodes to extend the features. While this is a great feature, actually writing the code can be tricky. In part because the code for the admin configuration panel is contained in an html file containing 3 script entries that are Node-RED specific. This post shows you a relatively easy way to split that into 3 files and combine them with a build step using an npm cross-platform script.
All browsers have the console object that lets you output to the developer console log. But in production, you don’t want this output, only in development. So here is the easiest way I’ve found to take control.
How can I know if a user has access to a file or a folder in Linux? Also, what groups is a user a member of? A few things I can never remember how to do.