mac 安装homebrew出错 Failed to connect to raw.githubusercontent.com port 443: Connection refused error:

折腾了好久，执行

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

开始一直报错Failed to connect to raw.githubusercontent.com port 443: Connection refused error: Error: 7，

尝试过改动git config的代理，没有用，

换中科大的源，也没有用

最后解决办法如下，重装command line tools，再执行安装指令，homebrew安装成功。

1. removing the old tools ($ rm -rf /Library/Developer/CommandLineTools)
2. install xcode command line tools again ($ xcode-select --install).
3. /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"