要修改的文件 /etc/apt/sources.list
原资源镜像文件
deb http://mirrors.aliyun.com/ubuntu/ yakkety main multiverse restricted universe
deb http://mirrors.aliyun.com/ubuntu/ yakkety-backports main multiverse restricted universe
deb http://mirrors.aliyun.com/ubuntu/ yakkety-proposed main multiverse restricted universe
deb http://mirrors.aliyun.com/ubuntu/ yakkety-security main multiverse restricted universe
deb http://mirrors.aliyun.com/ubuntu/ yakkety-updates main multiverse restricted universe
deb-src http://mirrors.aliyun.com/ubuntu/ yakkety main multiverse restricted universe
deb-src http://mirrors.aliyun.com/ubuntu/ yakkety-backports main multiverse restricted universe
deb-src http://mirrors.aliyun.com/ubuntu/ yakkety-proposed main multiverse restricted universe
deb-src http://mirrors.aliyun.com/ubuntu/ yakkety-security main multiverse restricted universe
deb-src http://mirrors.aliyun.com/ubuntu/ yakkety-updates main multiverse restricted universe
一个个改太麻烦，用脚本方便点
163
Codename=$( (lsb_release -a)|awk '{print $2}'|tail -n 1 )
echo "
deb http://mirrors.163.com/ubuntu/ $Codename main multiverse restricted universe
deb http://mirrors.163.com/ubuntu/ $Codename-backports main multiverse restricted universe
deb http://mirrors.163.com/ubuntu/ $Codename-proposed main multiverse restricted universe
deb http://mirrors.163.com/ubuntu/ $Codename-security main multiverse restricted universe
deb http://mirrors.163.com/ubuntu/ $Codename-updates main multiverse restricted universe
deb-src http://mirrors.163.com/ubuntu/ $Codename main multiverse restricted universe
deb-src http://mirrors.163.com/ubuntu/ $Codename-backports main multiverse restricted universe
deb-src http://mirrors.163.com/ubuntu/ $Codename-proposed main multiverse restricted universe
deb-src http://mirrors.163.com/ubuntu/ $Codename-security main multiverse restricted universe
deb-src http://mirrors.163.com/ubuntu/ $Codename-updates main multiverse restricted universe ">sources.list
ali yun
Codename=$( (lsb_release -a)|awk '{print $2}'|tail -n 1 )
echo "
deb http://mirrors.aliyun.com/ubuntu/ $Codename main multiverse restricted universe
deb http://mirrors.aliyun.com/ubuntu/ $Codename-backports main multiverse restricted universe
deb http://mirrors.aliyun.com/ubuntu/ $Codename-proposed main multiverse restricted universe
deb http://mirrors.aliyun.com/ubuntu/ $Codename-security main multiverse restricted universe
deb http://mirrors.aliyun.com/ubuntu/ $Codename-updates main multiverse restricted universe
deb-src http://mirrors.aliyun.com/ubuntu/ $Codename main multiverse restricted universe
deb-src http://mirrors.aliyun.com/ubuntu/ $Codename-backports main multiverse restricted universe
deb-src http://mirrors.aliyun.com/ubuntu/ $Codename-proposed main multiverse restricted universe
deb-src http://mirrors.aliyun.com/ubuntu/ $Codename-security main multiverse restricted universe
deb-src http://mirrors.aliyun.com/ubuntu/ $Codename-updates main multiverse restricted universe ">sources.list
类似把 mirrors.aliyun.com 改成mirrors.163.com mirrors.utsc.cn 就可以
=============
（我是深圳，所以弄的比较近的，更多的源，大家可以到官网查下）
Ubuntu 默认的源地址 http://archive.ubuntu.com/ 为 http://mirrors.ustc.edu.cn 即可。
http://people.canonical.com/~cjwatson/mirror/list.html
https://launchpad.net/ubuntu/+cdmirrors
http://mirrors.163.com/.help/ubuntu.html
https://lug.ustc.edu.cn/wiki/mirrors/help/ubuntu
sudo vim /etc/apt/source.list
#alibaba
deb http://mirrors.aliyun.com/ubuntu/ trusty main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ trusty-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ trusty-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ trusty-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ trusty main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ trusty-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ trusty-backports main restricted universe multiverse
#163
deb http://mirrors.163.com/ubuntu/ trusty main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ trusty-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ trusty-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ trusty-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ trusty main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ trusty-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ trusty-backports main restricted universe multiverse
#中山大学
deb http://mirror.sysu.edu.cn/ubuntu/ trusty main restricted universe multiverse
deb http://mirror.sysu.edu.cn/ubuntu/ trusty-backports restricted universe multiverse
deb http://mirror.sysu.edu.cn/ubuntu/ trusty-proposed main restricted universe multiverse
deb http://mirror.sysu.edu.cn/ubuntu/ trusty-security main restricted universe multiverse
deb http://mirror.sysu.edu.cn/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://mirror.sysu.edu.cn/ubuntu/ trusty main restricted universe multiverse
deb-src http://mirror.sysu.edu.cn/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://mirror.sysu.edu.cn/ubuntu/ trusty-proposed main restricted universe multiverse
deb-src http://mirror.sysu.edu.cn/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://mirror.sysu.edu.cn/ubuntu/ trusty-updates main restricted universe multiverse
#中国科学技术大学
# 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释
deb https://mirrors.ustc.edu.cn/ubuntu/ xenial main restricted universe multiverse
# deb-src https://mirrors.ustc.edu.cn/ubuntu/ xenial main main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ xenial-updates main restricted universe multiverse
# deb-src https://mirrors.ustc.edu.cn/ubuntu/ xenial-updates main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ xenial-backports main restricted universe multiverse
# deb-src https://mirrors.ustc.edu.cn/ubuntu/ xenial-backports main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ xenial-security main restricted universe multiverse
# deb-src https://mirrors.ustc.edu.cn/ubuntu/ xenial-security main restricted universe multiverse
# 预发布软件源，不建议启用
# deb https://mirrors.ustc.edu.cn/ubuntu/ xenial-proposed main restricted universe multiverse
# deb-src https://mirrors.ustc.edu.cn/ubuntu/ xenial-proposed main restricted universe multiverse
记得之后
# 更新软件源
sudo apt-get update
# 更新软件
sudo apt-get upgrade
也可以指定更新 sudo apt-get upgrade golang
树莓派 参考 http://www.cnblogs.com/scotth/p/4397267.html