1.备份原源列表文件
2.修改/etc/apt/source.list，将163的源覆盖该文件
deb http://mirrors.163.com/ubuntu/ raring main universe restricted multiverse
deb-src http://mirrors.163.com/ubuntu/ raring main universe restricted multiverse
deb http://mirrors.163.com/ubuntu/ raring-security universe main multiverse restricted
deb-src http://mirrors.163.com/ubuntu/ raring-security universe main multiverse restricted
deb http://mirrors.163.com/ubuntu/ raring-updates universe main multiverse restricted
deb http://mirrors.163.com/ubuntu/ raring-proposed universe main multiverse restricted
deb-src http://mirrors.163.com/ubuntu/ raring-proposed universe main multiverse restricted
deb http://mirrors.163.com/ubuntu/ raring-backports universe main multiverse restricted
deb-src http://mirrors.163.com/ubuntu/ raring-backports universe main multiverse restricted
deb-src http://mirrors.163.com/ubuntu/ raring-updates universe main multiverse restricted
3.执行更新sudo apt-get update