Linux

2024 Update - I found myself stuck in this situation again, my Ubuntu root partition was completely full to the brim… I’m scrambling to remove apt chache and pruning and and all docker images, but then I run vgdisplay only to reaslise that my LVM LV isn’t even using the full amount of physical disk space (this is a VM and I have just expanded the VMDK file). Thankfully I wrote this blog post 4 years ago as a how-to. Well now I am going to give this post a refresh and this includes some extra details which I needed during the panic of a full disk. ...

I have covered this a number of times in the past and the posts have proved popular and useful to many. So, here is my guide for updating to the latest version of Python 3 (3.9) on Debian 10 Buster. To clarify the purpose of this guide, Debian 10 ships with Python 2 (2.7) and Python 3 (3.7) installed at my time of writing. For those wishing to upgrade from python 3.7.X to 3.8.X or 3.9.X, this is the guide for you. If you are trying to configure python 3.7 as your default interpreter when you call ‘python‘, try this: CHANGING THE DEFAULT PYTHON VERSION IN DEBIAN. This method involves using the ‘update-alternatives‘ command. We will be using a similar method in this guide, however this time we only do so to give 3.9.X a higher priority to 3.7.X, rather than uninstalling older versions. ...

A quick Google of the above only seemed to give me answers for the inverse, calling a python script from a bash shell and handing it variables. At least, the first 3 results showed this and I’m probably not alone when it comes to scrolling down past the StackOverflow articles. So I am had to go it alone and the way that I figured out how to call a bash command with variables in Python (3), is a total hack… But it works. This is commonly referred to as ‘getting the job done’ code. ...

Error Correcting Code (ECC) RAM is a variation of coputer memory which helps to ilimintate data curruption or ‘bit rot’, but it is not always imediately apparent if your system memory is running in ECC mode; here is a quick guide on how to check if your system memory is running in ECC mode. This guide covers Windows and Linux systems, but please ensure that if you are running either system in a virtual machine configuration that this command is ran on the host machine. ...

The Pi enthusiasts have been waiting for official USB boot support on the Raspberry Pi for what feels like a lifetime, but finally it is on the horizon. In this post I will explain how to make your Raspberry Pi boot from USB. WARNING: Although this is official, it is still in beta testing, so rock-solid stability is far from certain. Learn more about this beta release here. ...