The missing package manager for macOS, MacOS上的包管理工具。
安装脚本：
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
Homebrew installs the stuff you need that Apple didn’t.
$ brew install wget
Homebrew installs packages to their own directory and then symlinks their files into /usr/local.
$ cd /usr/local
$ find Cellar
Cellar/wget/1.16.1
Cellar/wget/1.16.1/bin/wget
Cellar/wget/1.16.1/share/man/man1/wget.1
$ ls -l bin
bin/wget -> ../Cellar/wget/1.16.1/bin/wget
