These are a bunch of docker commands that I find useful for keeping things tidy. Remove all orphaned images. These are the images tagged as <none>. docker images -q --filter "dangling=true" | xargs docker rmi Delete/remove all stopped containers. Note that -v option; it will also delete any persistent volumes that belong to the stopped containers. docker ps -aq --filter "status=exited" | xargs docker rm -v && docker ps -aq --filter "status=created"

I have recently switched to a MacBook Pro as my daily driver. One of the first things I noticed was that there was no maximise button on application windows, only a fullscreen option that hides the top status-bar. A quick google search told me that double clicking the title-bar or holing down ALT while clicking in the Green Icon would maximise the window instead of making it go fullscreen. Which is great!

For my latest javascript/threejs experiment I created a retro 1980’s inspired demo, which renders hundreds of sprites in a pseudo 3D style that was common in the Atari ST and Amiga demos of the late 80’s. Of course, no retro demo would be complete without a retro soundtrack. For my Retro Particle Demo this would be a short track that loops continuously. My initial attempt used the html5 audio tag: <audio id="demomusic" src="audio/music.

A retro demo inspired inspired by the Atari ST demo scene of the late 1980's

A simple browser based slot machine game written using the excellent three.js javascript library.

A simple 2D puzle game written in JavaScript with the Pixi.js framework that runs in the browser.

Online JavaScript keycode lookup utility

A list of machine emulators completely written in JavaScript that I find to be both impressive and interesting. Writing an emulator in any language is difficult and requires some serious programming chops. But to do it in JavaScript must surely require a level of programming genius (or maybe madness - I hear it’s a fine line!) that us mere mortals can only dream of aspiring to. These are my favourites that I’ve stumbled across, catalogued here so I can easily find them again whenever I feel the need for a retro computing fix…

The classic zx spectrum game lightcycles recreated in JavaScript that runs in the browser.

Sometimes, when setting up and debugging a container it is extremely useful to be able to ‘shell into’ the container to get a closer look at what’s going on. This is a quick guide on how to get shell console access into a running Docker container. UPDATE. If you are running docker version 1.3 or greater then you should use docker exec instead (see docker man pages for more info). The only use case that still requires the use of nsenter is where the user assigned to the container prevents you from doing tasks inside.