rustup doc

Open the offline Rust documentation for the current toolchain. There are a lot more documentation pages not mentioned here. See rustup help doc for more information. More information: https://rust-lang.github.io/rustup.

• Open the main page:

rustup doc

• Open the documentation for a specific topic (a module in the standard library, a type, a keyword, etc.):

rustup doc std::fs|usize|fn|...

• Open the Rust Programming Language book:

rustup doc --book

• Open the Cargo book:

rustup doc --cargo

• Open the Rust Reference:

rustup doc --reference