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163对Ubuntu的sources进行了镜像，对于amd-64位系统，其它版本应该也可以使用。
vim /etc/apt/sources.list insert 将其它的用#注释起来，将如下的添加进去
#add by neruda 2015-12-13, added 163 source
deb http://mirrors.163.com/ubuntu/ precise main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ precise-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ precise-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ precise-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ precise main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ precise-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ precise-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ precise-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ precise-backports main restricted universe multiverse
然后 esc 输入shirt+: 然后 wq
执行命令 apt-get update 就能看到系统在更换软件源。
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原文地址：http://www.cnblogs.com/neruda/p/5043851.html
