DNS/実装/Rustについて、ここに記述してください。
https://blog.rust-lang.org/2021/02/11/Rust-1.50.0.html
https://www.rust-lang.org/tools/install
Is Rust up to date?
Rust updates very frequently. If you have installed Rustup some time ago, chances are your Rust version is out of date. Get the latest version of Rust by running rustup update.
Cargo: the Rust build tool and package manager
$ cargo --version cargo 1.50.0 (f04e7fab7 2021-02-04)
$ cd hello-rust/
tmaeno@skr:~/hello-rust$ cargo run
Compiling hello-rust v0.1.0 (/home/tmaeno/hello-rust)
Finished dev [unoptimized + debuginfo] target(s) in 0.91s
Running `target/debug/hello-rust`
Hello, world!