安装homebrew报错： Failed to connect

命令行执行

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

报错：

Failed to connect to raw.githubusercontent.com port 443: Connection refused error: Error: 7，

解决办法：
重装command line tools，再执行安装指令，homebrew安装成功。

具体步骤：
1、removing the old tools

$ sudo rm -rf /Library/Developer/CommandLineTools

2、install xcode command line tools again

$ sudo xcode-select --install

3、重新安装

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