intall homebrew on MAC OS X

# install homebrew

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

# usage: intall wget

brew install get

# Homebrew Cask，是已经编译好了的应用包 （.dmg/.pkg），仅仅是下载解压
# 安装目录：/opt/homebrew-cask/Caskroom

brew install caskroom/cask/brew-cask

# usage: install chrome

brew cask search chromebrew cask install google-chrome