以下推荐比较快速的Ubuntu 17.04更新源，供大家参考学习。
首先在系统中编辑/etc/apt/sources.list文件（sudo nano /etc/apt/source.list），在该文件的最前面添加下面源信息：
deb http://mirrors.163.com/ubuntu/ zesty main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ zesty-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ zesty-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ zesty-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ zesty-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ zesty main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ zesty-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ zesty-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ zesty-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ zesty-backports main restricted universe multiverse
然后运行命令：sudo apt-get update &&sudo apt-get upgrade&& sudo apt-get dist-upgrade
注：如果要覆盖/etc/apt/sources.list文件请先作好备份。
参考文章
Ubuntu更新Source.list源：http://www.linuxdiyf.com/linux/22170.html