“You made 5 billionth search” scam
When I was going to Worldometer’s coronavirus page, it would redirect me to some stupid scam web site saying “you made 5 billionth search”. It happened only one one of […]
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Python: logical operations with None and Booleans
Coming back to the blog after long break. Today, almost by accident I found how logical operators work with None in Python. The result is surprising, because it is not […]
Can’t reuse Dell computer parts
I have a very nicely built 12 year old Dell tower, that I inherited from some startup, which I use as a home server running Ubuntu. I also have a […]
Guido said it would cause too much disturbance…
Python has two ways to convert an object to a string: str(x) and repr(x). str is supposed to be user-readable, and repr is more technical, e.g. for debugging purposes. To […]
Type cast in Python
TL;DR: Python type cast looks like an assertion: # Python x = expression_returning_Base assert isinstance(x, Derived) This corresponds to Java or C# // Java Derived x = (Derived)expression_returning_Base; In languages […]
Bash: is missing file older than existing file?
In bash it is possible to test whether one file is older or newer than the other: if [ file1 -nt file2 ]; then # do something fi if [ […]
Docker: why one process per container does not always work
My “permanent” SSL certificates are expiring soon, so I decided to switch to letsecnrypt. The easiest way to obtain their certificate is allegedly to use Certbot. There is a nice […]
“Register” is a new “buy”?
I needed an IRC client for Windows, and mIRC came up in searches as #1 recommended. It said something about “registration” during the installation, but I ignored assuming that registration […]
File permissions on Docker volumes
When a host directory is mounted into a docker container, how are file permissions handled? Docker copies files permissions from the host to the container verbatim, inluding numeric user ids. […]
A funny story about Mac hardware
I have a MacBook Pro now, courtesy of my new employer, but it only has four USB-C ports and nothing else, so none of my existing hardware could connect to […]