搜了好多篇文章，都没安装成功，
官网(https://brew.sh/)给出的安装命令：
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"
第一次安装，报如下错误：连接被拒绝
curl: (7) Failed to connect to raw.githubusercontent.com port 443: Connection not permitted
解决办法：/etc/hosts 文件添加： 60.177.171.184 raw.githubusercontent.com，ip地址来自 https://www.ipaddress.com/ ，查询一下raw.githubusercontent.com对应的ip
第二次安装，报如下错误：连接超时
curl: (7) Failed to connect to raw.githubusercontent.com port 443: Operation timed out
解决办法：/usr/bin/ruby -e "$(curl -fsSL https://cdn.jsdelivr.net/gh/ineo6/homebrew-install/install)"，
使用此安装地址
