mac终端安装node时候，显示“-bash: brew: command not found”，怎么解决？
先安装brew
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"没安装 Homebrew
bash 下执行 ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"