rustup toolchain

Manage Rust toolchains. See rustup help toolchain for more information about toolchains. More information: https://rust-lang.github.io/rustup.

• Install or update a given toolchain:
  rustup install {{toolchain}}
• Uninstall a toolchain:
  rustup uninstall {{toolchain}}
• List installed toolchains:
  rustup list
• Create a custom toolchain by symlinking to a directory:
  rustup link {{custom_toolchain_name}} {{path/to/directory}}