Stage 2.3: rustup

rustup is Rust's toolchain manager. To see all available options of this tool, run rustup --help.

It's used for:

• updating Rust: rustup update
• installing Rust tools like Clippy (a static analysis tool): rustup component add clippy - you can run it then with cargo clippy
• Open the official The book: rustup doc --book
• Show active and installed tools: rustup show
• Switching between profiles, e. g. stable and nightly version of Rust

rustup can be updated with rustup self update, but it's also being updated at the end of rustup update.

Further information:

• https://doc.rust-lang.org/nightly/edition-guide/rust-2018/rustup-for-managing-rust-versions.html