what is this good for

[rstfnk]

lad, I do not know about ubuntu server literally nothing especially in comparison with your knowledge. so basically you wrote some script which I copy between my repositories, then I allow shell to change security settings by following your commands create a new login and ssh key provided by you so you can start using my machine? I am here 1st day, trying to configure and understand ubuntu server a little but I do not think that what you suggesting is right. please correct me if I am wrong. thanks

[samplep182]

I believe you are incorrect with this, but I have not dived deep into reading the code (maybe you did?). But in the README file, there is a command to generate a new key pair and then copy one of them to where it needs to be.
If he is bypassing that or replacing something in the script, I don't know about that.