安装 Rust
在 Unix 类系统如 Linux 和 macOS 上，打开终端并输入：
curl https://sh.rustup.rs -sSf | sh
回车后安装过程出现如下显示：
info: downloading installer Welcome to Rust! This will download and install the official compiler for the Rust programming language, and its package manager, Cargo. It will add the cargo, rustc, rustup and other commands to Cargo's bin directory, located at: /root/.cargo/bin This path will then be added to your PATH environment variable by modifying the profile files located at: /root/.profile /root/.bash_profile You can uninstall at any time with rustup self uninstall and these changes will be reverted. Current installation options: default host triple: x86_64-unknown-linux-gnu default toolchain: stable modify PATH variable: yes 1) Proceed with installation (default) 2) Customize installation 3) Cancel installation
选择 1 ，回车继续；
这样会下载一个脚本并开始安装。如果一切顺利，你将会看到：
Current installation options: default host triple: x86_64-unknown-linux-gnu default toolchain: stable modify PATH variable: yes 1) Proceed with installation (default) 2) Customize installation 3) Cancel installation >1 info: syncing channel updates for 'stable-x86_64-unknown-linux-gnu' 334.4 KiB / 334.4 KiB (100 %) 191.0 KiB/s ETA: 0 s info: latest update on 2019-05-14, rust version 1.34.2 (6c2484dc3 2019-05-13) info: downloading component 'rustc' 85.3 MiB / 85.3 MiB (100 %) 172.7 KiB/s ETA: 0 s info: downloading component 'rust-std' 56.1 MiB / 56.1 MiB (100 %) 182.4 KiB/s ETA: 0 s info: downloading component 'cargo' 4.3 MiB / 4.3 MiB (100 %) 188.8 KiB/s ETA: 0 s info: downloading component 'rust-docs' 10.2 MiB / 10.2 MiB (100 %) 169.4 KiB/s ETA: 0 s info: installing component 'rustc' 85.3 MiB / 85.3 MiB (100 %) 12.8 MiB/s ETA: 0 s info: installing component 'rust-std' 56.1 MiB / 56.1 MiB (100 %) 13.3 MiB/s ETA: 0 s info: installing component 'cargo' info: installing component 'rust-docs' 10.2 MiB / 10.2 MiB (100 %) 1.2 MiB/s ETA: 0 s info: default toolchain set to 'stable' stable installed - rustc 1.34.2 (6c2484dc3 2019-05-13) Rust is installed now. Great! To get started you need Cargo's bin directory ($HOME/.cargo/bin) in your PATH environment variable. Next time you log in this will be done automatically. To configure your current shell run source $HOME/.cargo/env
如上显示代表安装完成；
rust卸载
卸载 Rust 跟安装它一样容易：
rustup self uninstall
第一个Rust程序
依据惯例，打印hello,world
编辑创建文件main.rs
fn main() { println!("Hello, world!"); }
编译（类似于C语言的gcc编译）：
rustc main.rs
运行：
./main
输出：
Hello, world!
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