最近在搭建 Vagrant 服务器的时候, 使用 sudo apt-get update 的时候出现了访问错误

Err http://archive.ubuntu.com trusty InRelease

Err http://archive.ubuntu.com trusty-updates InRelease

Err http://security.ubuntu.com trusty-security InRelease

Err http://archive.ubuntu.com trusty Release.gpg
  Could not resolve 'archive.ubuntu.com'
Err http://security.ubuntu.com trusty-security Release.gpg
  Could not resolve 'security.ubuntu.com'
Err http://archive.ubuntu.com trusty-updates Release.gpg
  Could not resolve 'archive.ubuntu.com'
Reading package lists... Done
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty/InRelease
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty-updates/InRelease

使用 ping www.baidu.com 发现可以返回数据, 但是 ping archive.Ubuntu.com 则没有反应, host 机器是有访问返回的.

修正方法是:
step 1: 修改host /etc/hosts
添加如下映射

91.189.91.93    archive.ubuntu.com
91.189.91.93    security.ubuntu.com

step 2: 重启network服务

$ /etc/init.d/networking restart