替换git和homebrew镜像源

一、git加速

1. 查找域名对应的地址
   nslookup github.com
   nslookup github.global.ssl.fastly.Net

2. 修改hosts文件

   sudo vim /etc/hosts
   # add two lines at the end.
   31.13.66.1 github.global.ssl.fastly.net 
   13.229.188.59 github.com

3. 刷新DNS缓存（根据你的操作系统选择）

   # Mac
   sudo killall -HUP mDNSResponder
   # linux
   sudo /etc/init.d/networking restart

二、homebrew替换为清华镜像源

清华镜像站：清华镜像站

homebrew替换指南：帮助文档

git -C "$(brew --repo)" remote set-url origin https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/brew.git
git -C "$(brew --repo homebrew/core)" remote set-url origin https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/homebrew-core.git
git -C "$(brew --repo homebrew/cask)" remote set-url origin https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/homebrew-cask.git
brew update