Rust 版本升级 rustup update stable 报错
一、报错内容
error: could not download file from 'static.rust-lang.org/dist/channe…' to '/Users/xxx/.rustup/tmp/rv6vdfu3eupwo64m_file': failed to make network request: error sending request for url (static.rust-lang.org/dist/channe…): error trying to connect: tcp connect error: Connection refused (os error 61): error trying to connect: tcp connect error: Connection refused (os error 61): tcp connect error: Connection refused (os error 61): Connection refused (os error 61)
error: could not download file from '<https://static.rust-lang.org/dist/channel-rust-stable.toml.sha256>' to '/Users/xxx/.rustup/tmp/rv6vdfu3eupwo64m\_file': failed to make network request: error sending request for url (<https://static.rust-lang.org/dist/channel-rust-stable.toml.sha256>): error trying to connect: tcp connect error: Connection refused (os error 61): error trying to connect: tcp connect error: Connection refused (os error 61): tcp connect error: Connection refused (os error 61): Connection refused (os error 61)
错误内容：
系统无法连接到 Rust 语言官方的静态文件服务器 static.rust-lang.org，导致对应的文件没有下载到指定的文件夹中
二、解决方案-手动安装对应文件(推荐)
1. 下载对应的文件
点击下面链接进行下载 static.rust-lang.org/dist/channe…
2. 放到指定文件夹中
在报错内容中可以看到是放到你的 /Users/xxx/.rustup/tmp/ 这个文件夹中，打开文件夹，放到对应内容中即可，如下所示：
3. 重新执行 rustup update stable
终端中重新执行 rustup update stable 即可进行 rust 更新
升级版本下载比较多的内容，耐心等待即可
4. 查看新版本
4.1. cargo version
cargo 更新
4.2. rustup --version
rustup 更新
4.3. rustc --version
rust 更新
三、解决方案-重新安装 Rustup
1. 先卸载 rustup
rustup self uninstall
2. 重新安装
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
