Homebrew的安装

1. 进入官网, 查看安装命令

   https://brew.sh/

2. 复制安装命令

  $  /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

3. 安装报错
   3.1 错误信息:
   curl: (7) Failed to connect to raw.githubusercontent.com port 443: Operation timed out
   解决方案:
   https://www.cnblogs.com/yanht/p/brew-note.html