I'm addressing one side of this.
Please refer askubuntu.com/help/on-topic, Ubuntu and official flavors of Ubuntu (ubuntu.com/download/flavours) are on-topic on this site. The on-topic link provides alternate SE sites for non-Ubuntu OSes. This isn't a Linux site - SE Unix & Linux covers Linux
This is a comment I saw under a question where nothing in the question indicated that it wasn't about Ubuntu - and the question was about a basic Unix utility that is part of base Ubuntu install.
I think we should establish that we have good faith. If the question doesn't clearly indicate that it's not about Ubuntu, via for instance mentioning other operating systems or mentioning versions that never shipped with Ubuntu, we should assume - and answer - as if the question is about Ubuntu.
Let's assume it's about Ubuntu. If we need to ask what Ubuntu version, assume it is an supported one. Assume it's Ubuntu - until told otherwise.
Remember that we're supporting use of Ubuntu. Not only the very basic things, but topics as wide-spread as macros in LibreOffice and shell scripting in Bash - it's all part of Ubuntu.
In addition to the support aspect, please remember that we are providing a knowledge base for Ubuntu users. How to write a bash for loop is useful knowledge for Ubuntu users. That it's useful knowledge for Slackware users doesn't change this. You suspect that the asker runs Slackware, but nothing in the question indicates it? Why is that important? The answer will be applicable to Ubuntu!