A first look at Rust in the 6.1 kernel

rustup's behavior of modifying your startup scripts is not quite "silent". When you run the curl | sh, you get a pretty clear explanation:

> This path will then be added to your PATH environment variable by
> modifying the profile files located at:
>
> /home/comex/.profile
> /home/comex/.bashrc
> /home/comex/.zshenv

It then gives you options to confirm or customize, and one of the options to customize is whether to modify the startup scripts.

To be fair, this is only one part of a wall of text, so it's easy to skip past… but the rest of the text is pretty useful as well.