While working with many applications in containers, especially if you're not building them yourself, it's not always clear, what type of base operating system you're using.

There are two commands below to quickly check Alpine Linux version (will work for most distributives, actually) from the console:

I'm using 'boky/postfix' docker image for emails sending from my Kubernetes-cluster. Recently security scanning system started alerting me about vulnerability in the 'py3-setuptools' package (Alpine Linux), which I can mitigate by upgrading that package to the latest version.

As usually, I'm going to my custom Dockerfile and updating string for explicit package upgrade...