一、安装Homebrew
1、打开官网：Homebrew — The Missing Package Manager for macOS (or Linux)
2、打开终端输入：
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
二、安装Telnet
brew install telnet
三、执行Telnet命令
telnet api.evcoming.com 5131
