Category Archives: Computers

Mac OS X and Windows

‘bash\r’: No such file or directory. Or, editing unix files on a Windows machine

'bash\r': No such file or directory

What does that mean, you ask yourself? It usually means you are editing *nix script files on a windows system, and then running the files on a *nix machine. For instance in docker, or a VM. Your solution is to use a text editor that allows you to save with unix line endings. `Notepad++` calls it, very reasonably, `’EOL conversion’`. Sublime text calls it `View->Line Endings`.

A further complication if you are using git is that it keeps getting reset back to windows. You could fix this with `git config core.autocrlf false` but that may have other consequences which you don’t want to bother with.

Use a public docker image in AWS ECS

Amazon Web Services carefully explain how to use a private docker image in ECS, the Amazon container service. But fails to mention what repository URL to use for a dockerhub public repository. The answer is … none at all. Just the same as the docker CLI, if you specify just namespace/imagename for a container image, ECS will pull it from dockerhub.

Deep Learning & Unintended Algorithm Bias

This was a 5 minute talk on deep learning for the very excellent @chesterdevs. Like others talking about deep learning, I took visuals and the face-learning example from the landmark 2012 paper, Quoc Le/Google/Andrew Ng paper, “Building High-level Features Using Large Scale Unsupervised Learning.”

Only afterwards did I notice that the subset of images which their system show as “most like a face” from their test set were 90% male and 90% white, as is the prototypical face that the machine outputs.

And so we have a neat demonstration of unintended algorithm bias: their input was 10 million randomly-chosen youtube videos; the output was white and male. I bet they didn’t expect that.

A salutary reminder that—as the hard-working statistician will tell you—“random selection” does not mean “unbiased”.

AutoHotKey script for they who, being Mac Users and also equipped with an Apple keyboard, yet still they work at a Windows desktop

Surprising how much time you can spend on these little niggles…

  • Irritated that Windows doesn’t have an ellipsis key?
  • Wondering how to do printscreen from your apple keyboard?
  • Really really fed up with swapping between Cut‘n’Paste is “⌘-C,⌘-V” and Cut‘n’Paste is “Ctrl-c-Ctrl-v”?

Help is at hand.


When I first came across I was a bit unsure about using AutoHotKey. But I have seen the light. It is the bee’s knees. It is open source, widely used for years, free, small footprint and is the ultimate customise-all-the-things tool for Windows. It is a combined scripting tool & Keyboard/Mouse hotkey manager.

My AutoHotKey for a Mac User with an Apple keyboard on Windows Script

There you are. It’s all you need. That, and a few hours to customise it yourself. Then a few more hours to… oh, never mind.


When I said that AHK is the bee’s knees, I didn’t say that the language isn’t arcane, unintuitive and bearing signs of organic growth over a decade or more…