sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak #备份 sudo vim /etc/apt/sources.list #修改
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
sudo apt-get update #更新列表
如果使用其他镜像，可以参考http://wiki.ubuntu.com.cn/%E6%A8%A1%E6%9D%BF:Ubuntu_source
这个模板，记得把
# Canonical 合作伙伴和附加 deb http://archive.canonical.com/ubuntu/ vivid partner deb http://extras.ubuntu.com/ubuntu/ vivid main
给去掉
然后把模板中的vivid换成相应ubuntu版本，比如我这里是 trusty