Technical notes, my online memory

Here is a python snippet that mocks out tempfile.NamedTemporaryFile() to use a StringIO and add it to an array of file handles. The somewh...

We were missing an import in our pyinstaller, the error was: ImportError: No module named google.protobuf There is a simple fix for this...

I often want to change a class attribute in a unit test. While it is sort of documented in the official documentation , it's missing an ...

This snippet will download openssl and verify the hash against a hard-coded value. This is useful on old operating systems (specifically Cen...

RedHat has long had an insane requiretty default for sudo , something that is fixed in later versions. Packer rightly doesn't set a tty ...

Intended as a living document, just some basics for now. Build from the Dockerfile in the current directory and tag the image as "dem...

Docker and Vagrant are somewhat similar technologies, so what are their relative strengths and weaknesses and when should you choose one ove...