$ ls -lh ./posts

Linux: how to delete only empty files or directories

Recently I had to deal with old “sins”, I had some scripts that did not behave very well and potentially leave empty directories on the…

cat linux-how-to-delete-only-empty-files-or-directories.md →

Bash: associative arrays how to

An associative array stores multiple data with keys corresponding values, each value can be accessed with the key of the array.

cat bash-associative-arrays-how-to.md →

Python: How to convert string to a datetime object

Converting a string to a datetime is needed to perform datetime comparisons and calculations. Converting a string to a datetime object is…

cat python-how-to-convert-string-to-a-datetime-object.md →

FastAPI: Create a repeated task

sometimes, you want a task to trigger not just when the server starts but also periodically. For example, you might want to regularly check…

cat fastapi-create-a-repeated-task.md →

Linux: check if a file is newer than another.

test command is convenient; it can verify if a filename is a file or a directory and many other things, but it can also make age…

cat linux-check-if-a-file-is-newer-than-another.md →

Linux: Check if a file or directory exists.

More often than you will need to verify in your scripts whether a file or directory exists or not. To do this, you can use the test…

cat linux-check-if-a-file-or-directory-exists.md →

Create REST APIs with FastAPI

A REST API (also known as RESTful API) is an application programming interface (API or web API) that conforms to the constraints of REST…

cat create-rest-apis-with-fastapi.md →

Linux: Create a one-line web server in bash that will execute shell commands.

Do you want a quick, dirty, and unsafe way to execute commands to your Linux box over HTTP? You can use the following hack! I don't…

cat linux-create-a-one-line-web-server-in-bash-that-will-execute-shell-commands.md →

Linux: How to port forward only while a process uses a port.

I work in an environment where the email servers are behind an SSH gateway, and sending emails through them is a pain since we need to do…

cat linux-how-to-port-forward-only-while-a-process-uses-a-port.md →

Simple and honest answers to difficult interview questions for IT (and not only) people.

Note that I am not an HR person; I work in the IT industry, and my experience with interviews where on side of the candidate, but I believe…

cat simple-and-honest-answers-to-difficult-interview-questions-for-it-and-not-only-people.md →