[HankB99]

That's how Rust installs. I'm not that happy with it but at the time (years ago) the distro (Debian) packages were incomplete. From https://www.rust-lang.org/tools/install

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

At least it does not require sudo (unless that's buried in the script.)

[steveklabnik]

It does not require sudo, by design.