mac or linux

 $ curl https://sh.rustup.rs -sSf | sh

 $ source $HOME/.cargo/env
 $ rustup update
 $ rustup self uninstall
 $ rustc --version

cargo

$ cargo --version
$ cargo new hello_cargo 
$ cd hello_cargo

$ cargo build
   Compiling hello_cargo v0.1.0 (/Users/mahao/rust/src/hello_cargo)
    Finished dev [unoptimized + debuginfo] target(s) in 0.82s

$ cargo run 
    Finished dev [unoptimized + debuginfo] target(s) in 0.03s
     Running `target/debug/hello_cargo`
Hello, world!

$ cargo check
    Checking hello_cargo v0.1.0 (/Users/mahao/rust/src/hello_cargo)
    Finished dev [unoptimized + debuginfo] target(s) in 0.18s

$ cargo build --release