模板:12.04source

Ubuntu 官方更新服务器（欧洲，此为官方源，国内较慢，但无同步延迟问题，电信网通用户可以使用)：

deb http://archive.ubuntu.com/ubuntu/ precise main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ precise-security main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ precise-updates main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ precise-proposed main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ precise main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ precise-security main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ precise-updates main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ precise-proposed main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse

Ubuntu官方提供的其他软件（第三方闭源软件等）：

deb http://archive.canonical.com/ubuntu/ precise partner
deb http://extras.ubuntu.com/ubuntu/ precise main

骨头兄亲自搭建并维护这个Ubuntu源（该源位于浙江杭州百兆共享宽带的电信机房)，包含 Deepin 等镜像：

deb http://ubuntu.srt.cn/ubuntu/ precise main restricted universe multiverse
deb http://ubuntu.srt.cn/ubuntu/ precise-security main restricted universe multiverse
deb http://ubuntu.srt.cn/ubuntu/ precise-updates main restricted universe multiverse
deb http://ubuntu.srt.cn/ubuntu/ precise-proposed main restricted universe multiverse
deb http://ubuntu.srt.cn/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://ubuntu.srt.cn/ubuntu/ precise main restricted universe multiverse
deb-src http://ubuntu.srt.cn/ubuntu/ precise-security main restricted universe multiverse
deb-src http://ubuntu.srt.cn/ubuntu/ precise-updates main restricted universe multiverse
deb-src http://ubuntu.srt.cn/ubuntu/ precise-proposed main restricted universe multiverse
deb-src http://ubuntu.srt.cn/ubuntu/ precise-backports main restricted universe multiverse

网易163更新服务器（广东广州电信联通千兆双线接入），包含其他开源镜像：

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

搜狐更新服务器（山东联通千兆接入，官方中国大陆地区镜像跳转至此） ，包含其他开源镜像：

deb http://mirrors.sohu.com/ubuntu/ precise main restricted universe multiverse
deb http://mirrors.sohu.com/ubuntu/ precise-security main restricted universe multiverse
deb http://mirrors.sohu.com/ubuntu/ precise-updates main restricted universe multiverse
deb http://mirrors.sohu.com/ubuntu/ precise-proposed main restricted universe multiverse
deb http://mirrors.sohu.com/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ precise main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ precise-security main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ precise-updates main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ precise-proposed main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ precise-backports main restricted universe multiverse

LupaWorld更新服务器（浙江杭州电信联通双线服务器），包含其他开源镜像：

deb http://mirror.lupaworld.com/ubuntu precise main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu precise-security main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu precise-updates main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu precise-backports main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu precise-proposed main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu precise main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu precise-security main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu precise-updates main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu precise-backports main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu precise-proposed main restricted universe multiverse

常州贝特康姆软件技术有限公司 更新服务器（江苏常州电信服务器），包含其他开源镜像。

( CN99域名 系 “常州市亚科技术有限公司” 所注册，但此公司与常州贝特康姆的法人代表和地址相同。所以本镜像实际即原 CN99。但现在 CN99镜像的域名已改为跳转至网易镜像）:

deb http://centos.bitcomm.cn/ubuntu precise main restricted universe multiverse
deb http://centos.bitcomm.cn/ubuntu precise-security main restricted universe multiverse
deb http://centos.bitcomm.cn/ubuntu precise-updates main restricted universe multiverse
deb http://centos.bitcomm.cn/ubuntu precise-backports main restricted universe multiverse
deb http://centos.bitcomm.cn/ubuntu precise-proposed main restricted universe multiverse
deb-src http://centos.bitcomm.cn/ubuntu precise main restricted universe multiverse
deb-src http://centos.bitcomm.cn/ubuntu precise-security main restricted universe multiverse
deb-src http://centos.bitcomm.cn/ubuntu precise-updates main restricted universe multiverse
deb-src http://centos.bitcomm.cn/ubuntu precise-backports main restricted universe multiverse
deb-src http://centos.bitcomm.cn/ubuntu precise-proposed main restricted universe multiverse

以下为教育网服务器（推荐教育网用户使用，部分非教育网用户也有可观的速度。教育网用户请优先使用IPv6地址。

中国科学技术大学更新服务器（位于合肥，千兆教育网接入，百兆电信/联通线路智能路由），由中科大 Linux 用户协会和中科大学网络信息中心维护，包含其他开源镜像，Deepin 官方服务器 实际亦指向此处：

deb http://debian.ustc.edu.cn/ubuntu/ precise main multiverse restricted universe
deb http://debian.ustc.edu.cn/ubuntu/ precise-backports main multiverse restricted universe
deb http://debian.ustc.edu.cn/ubuntu/ precise-proposed main multiverse restricted universe
deb http://debian.ustc.edu.cn/ubuntu/ precise-security main multiverse restricted universe
deb http://debian.ustc.edu.cn/ubuntu/ precise-updates main multiverse restricted universe
deb-src http://debian.ustc.edu.cn/ubuntu/ precise main multiverse restricted universe
deb-src http://debian.ustc.edu.cn/ubuntu/ precise-backports main multiverse restricted universe
deb-src http://debian.ustc.edu.cn/ubuntu/ precise-proposed main multiverse restricted universe
deb-src http://debian.ustc.edu.cn/ubuntu/ precise-security main multiverse restricted universe
deb-src http://debian.ustc.edu.cn/ubuntu/ precise-updates main multiverse restricted universe

IPv6-Only 地址

deb http://mirrors6.ustc.edu.cn/ubuntu/ precise main multiverse restricted universe
deb http://mirrors6.ustc.edu.cn/ubuntu/ precise-backports main multiverse restricted universe
deb http://mirrors6.ustc.edu.cn/ubuntu/ precise-proposed main multiverse restricted universe
deb http://mirrors6.ustc.edu.cn/ubuntu/ precise-security main multiverse restricted universe
deb http://mirrors6.ustc.edu.cn/ubuntu/ precise-updates main multiverse restricted universe
deb-src http://mirrors6.ustc.edu.cn/ubuntu/ precise main multiverse restricted universe
deb-src http://mirrors6.ustc.edu.cn/ubuntu/ precise-backports main multiverse restricted universe
deb-src http://mirrors6.ustc.edu.cn/ubuntu/ precise-proposed main multiverse restricted universe
deb-src http://mirrors6.ustc.edu.cn/ubuntu/ precise-security main multiverse restricted universe
deb-src http://mirrors6.ustc.edu.cn/ubuntu/ precise-updates main multiverse restricted universe

清华大学更新服务器，（教育网核心节点百兆接入，已计划提高到千兆）由清华大学学生网管会维护。包含其他开源镜像：

deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ precise main restricted universe multiverse
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ precise-security main restricted universe multiverse
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ precise-updates main restricted universe multiverse
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ precise-backports main restricted universe multiverse
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ precise-proposed main restricted universe multiverse
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ precise main restricted universe multiverse
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ precise-security main restricted universe multiverse
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ precise-updates main restricted universe multiverse
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ precise-proposed main restricted universe multiverse

IPv4-Only 地址

deb http://mirrors.4.tuna.tsinghua.edu.cn/ubuntu/ precise main restricted universe multiverse
deb http://mirrors.4.tuna.tsinghua.edu.cn/ubuntu/ precise-security main restricted universe multiverse
deb http://mirrors.4.tuna.tsinghua.edu.cn/ubuntu/ precise-updates main restricted universe multiverse
deb http://mirrors.4.tuna.tsinghua.edu.cn/ubuntu/ precise-backports main restricted universe multiverse
deb http://mirrors.4.tuna.tsinghua.edu.cn/ubuntu/ precise-proposed main restricted universe multiverse
deb-src http://mirrors.4.tuna.tsinghua.edu.cn/ubuntu/ precise main restricted universe multiverse
deb-src http://mirrors.4.tuna.tsinghua.edu.cn/ubuntu/ precise-security main restricted universe multiverse
deb-src http://mirrors.4.tuna.tsinghua.edu.cn/ubuntu/ precise-updates main restricted universe multiverse
deb-src http://mirrors.4.tuna.tsinghua.edu.cn/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://mirrors.4.tuna.tsinghua.edu.cn/ubuntu/ precise-proposed main restricted universe multiverse

IPv6-Only 地址

deb http://mirrors.6.tuna.tsinghua.edu.cn/ubuntu/ precise main multiverse restricted universe
deb http://mirrors.6.tuna.tsinghua.edu.cn/ubuntu/ precise-backports main multiverse restricted universe
deb http://mirrors.6.tuna.tsinghua.edu.cn/ubuntu/ precise-proposed main multiverse restricted universe
deb http://mirrors.6.tuna.tsinghua.edu.cn//ubuntu/ precise-security main multiverse restricted universe
deb http://mirrors.6.tuna.tsinghua.edu.cn/ubuntu/ precise-updates main multiverse restricted universe
deb-src http://mirrors.6.tuna.tsinghua.edu.cn/ubuntu/ precise main multiverse restricted universe
deb-src http://mirrors.6.tuna.tsinghua.edu.cn/ubuntu/ precise-backports main multiverse restricted universe
deb-src http://mirrors.6.tuna.tsinghua.edu.cn/ubuntu/ precise-proposed main multiverse restricted universe
deb-src http://mirrors.6.tuna.tsinghua.edu.cn/ubuntu/ precise-security main multiverse restricted universe
deb-src http://mirrors.6.tuna.tsinghua.edu.cn/ubuntu/ precise-updates main multiverse restricted universe

北京交通大学更新服务器（教育网/电信百兆接入），由北京交通大学信息中心赞助，包含其他开源镜像。

（域名中的 bjtu 可以替换为 njtu ，即北交旧名“北方交通大学”对应域名） ：

deb http://mirror.bjtu.edu.cn/ubuntu/ precise main multiverse restricted universe
deb http://mirror.bjtu.edu.cn/ubuntu/ precise-backports main multiverse restricted universe
deb http://mirror.bjtu.edu.cn/ubuntu/ precise-proposed main multiverse restricted universe
deb http://mirror.bjtu.edu.cn/ubuntu/ precise-security main multiverse restricted universe
deb http://mirror.bjtu.edu.cn/ubuntu/ precise-updates main multiverse restricted universe
deb-src http://mirror.bjtu.edu.cn/ubuntu/ precise main multiverse restricted universe
deb-src http://mirror.bjtu.edu.cn/ubuntu/ precise-backports main multiverse restricted universe
deb-src http://mirror.bjtu.edu.cn/ubuntu/ precise-proposed main multiverse restricted universe
deb-src http://mirror.bjtu.edu.cn/ubuntu/ precise-security main multiverse restricted universe
deb-src http://mirror.bjtu.edu.cn/ubuntu/ precise-updates main multiverse restricted universe

IPv6-Only 地址

deb http://mirror6.bjtu.edu.cn/ubuntu/ precise main multiverse restricted universe
deb http://mirror6.bjtu.edu.cn/ubuntu/ precise-backports main multiverse restricted universe
deb http://mirror6.bjtu.edu.cn/ubuntu/ precise-proposed main multiverse restricted universe
deb http://mirror6.bjtu.edu.cn/ubuntu/ precise-security main multiverse restricted universe
deb http://mirror6.bjtu.edu.cn/ubuntu/ precise-updates main multiverse restricted universe
deb-src http://mirror6.bjtu.edu.cn/ubuntu/ precise main multiverse restricted universe
deb-src http://mirror6.bjtu.edu.cn/ubuntu/ precise-backports main multiverse restricted universe
deb-src http://mirror6.bjtu.edu.cn/ubuntu/ precise-proposed main multiverse restricted universe
deb-src http://mirror6.bjtu.edu.cn/ubuntu/ precise-security main multiverse restricted universe
deb-src http://mirror6.bjtu.edu.cn/ubuntu/ precise-updates main multiverse restricted universe

北京理工大学更新服务器（仅教育网可以访问），包含其他开源镜像：

deb http://mirror.bit.edu.cn/ubuntu/ precise main restricted universe multiverse
deb http://mirror.bit.edu.cn/ubuntu/ precise-security main restricted universe multiverse
deb http://mirror.bit.edu.cn/ubuntu/ precise-updates main restricted universe multiverse
deb http://mirror.bit.edu.cn/ubuntu/ precise-backports main restricted universe multiverse
deb http://mirror.bit.edu.cn/ubuntu/ precise-proposed main restricted universe multiverse
deb-src http://mirror.bit.edu.cn/ubuntu/ precise main restricted universe multiverse
deb-src http://mirror.bit.edu.cn/ubuntu/ precise-security main restricted universe multiverse
deb-src http://mirror.bit.edu.cn/ubuntu/ precise-updates main restricted universe multiverse
deb-src http://mirror.bit.edu.cn/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://mirror.bit.edu.cn/ubuntu/ precise-proposed main restricted universe multiverse

IPv6-Only 地址

deb http://mirror.bit6.edu.cn/ubuntu/ precise main restricted universe multiverse
deb http://mirror.bit6.edu.cn/ubuntu/ precise-security main restricted universe multiverse
deb http://mirror.bit6.edu.cn/ubuntu/ precise-updates main restricted universe multiverse
deb http://mirror.bit6.edu.cn/ubuntu/ precise-backports main restricted universe multiverse
deb http://mirror.bit6.edu.cn/ubuntu/ precise-proposed main restricted universe multiverse
deb-src http://mirror.bit6.edu.cn/ubuntu/ precise main restricted universe multiverse
deb-src http://mirror.bit6.edu.cn/ubuntu/ precise-security main restricted universe multiverse
deb-src http://mirror.bit6.edu.cn/ubuntu/ precise-updates main restricted universe multiverse
deb-src http://mirror.bit6.edu.cn/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://mirror.bit6.edu.cn/ubuntu/ precise-proposed main restricted universe multiverse

东北大学更新服务器，包含其他开源镜像：

deb http://ftp.neu.edu.cn/mirrors/ubuntu/ precise main multiverse restricted universe
deb http://ftp.neu.edu.cn/mirrors/ubuntu/ precise-backports main multiverse restricted universe
deb http://ftp.neu.edu.cn/mirrors/ubuntu/ precise-proposed main multiverse restricted universe
deb http://ftp.neu.edu.cn/mirrors/ubuntu/ precise-security main multiverse restricted universe
deb http://ftp.neu.edu.cn/mirrors/ubuntu/ precise-updates main multiverse restricted universe
deb-src http://ftp.neu.edu.cn/mirrors/ubuntu/ precise main multiverse restricted universe
deb-src http://ftp.neu.edu.cn/mirrors/ubuntu/ precise-backports main multiverse restricted universe
deb-src http://ftp.neu.edu.cn/mirrors/ubuntu/ precise-proposed main multiverse restricted universe
deb-src http://ftp.neu.edu.cn/mirrors/ubuntu/ precise-security main multiverse restricted universe
deb-src http://ftp.neu.edu.cn/mirrors/ubuntu/ precise-updates main multiverse restricted universe

IPv6地址

deb http://ftp.neu6.edu.cn/mirrors/ precise main multiverse restricted universe
deb http://ftp.neu6.edu.cn/mirrors/ precise-backports main multiverse restricted universe
deb http://ftp.neu6.edu.cn/mirrors/ precise-proposed main multiverse restricted universe
deb http://ftp.neu6.edu.cn/mirrors/ precise-security main multiverse restricted universe
deb http://ftp.neu6.edu.cn/mirrors/ precise-updates main multiverse restricted universe
deb-src http://ftp.neu6.edu.cn/mirrors/ precise main multiverse restricted universe
deb-src http://ftp.neu6.edu.cn/mirrors/ precise-backports main multiverse restricted universe
deb-src http://ftp.neu6.edu.cn/mirrors/ precise-proposed main multiverse restricted universe
deb-src http://ftp.neu6.edu.cn/mirrors/ precise-security main multiverse restricted universe
deb-src http://ftp.neu6.edu.cn/mirrors/ precise-updates main multiverse restricted universe

哈尔滨工业大学更新服务器，包含其他开源镜像：

deb http://run.hit.edu.cn/ubuntu/ precise main restricted universe multiverse
deb http://run.hit.edu.cn/ubuntu/ precise-security main restricted universe multiverse
deb http://run.hit.edu.cn/ubuntu/ precise-updates main restricted universe multiverse
deb http://run.hit.edu.cn/ubuntu/ precise-backports main restricted universe multiverse
deb http://run.hit.edu.cn/ubuntu/ precise-proposed main restricted universe multiverse
deb-src http://run.hit.edu.cn/ubuntu/ precise main restricted universe multiverse
deb-src http://run.hit.edu.cn/ubuntu/ precise-security main restricted universe multiverse
deb-src http://run.hit.edu.cn/ubuntu/ precise-updates main restricted universe multiverse
deb-src http://run.hit.edu.cn/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://run.hit.edu.cn/ubuntu/ precise-proposed main restricted universe multiverse

IPv6地址

deb http://run6.hit.edu.cn/ubuntu/ precise main restricted universe multiverse
deb http://run6.hit.edu.cn/ubuntu/ precise-security main restricted universe multiverse
deb http://run6.hit.edu.cn/ubuntu/ precise-updates main restricted universe multiverse
deb http://run6.hit.edu.cn/ubuntu/ precise-backports main restricted universe multiverse
deb http://run6.hit.edu.cn/ubuntu/ precise-proposed main restricted universe multiverse
deb-src http://run6.hit.edu.cn/ubuntu/ precise main restricted universe multiverse
deb-src http://run6.hit.edu.cn/ubuntu/ precise-security main restricted universe multiverse
deb-src http://run6.hit.edu.cn/ubuntu/ precise-updates main restricted universe multiverse
deb-src http://run6.hit.edu.cn/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://run6.hit.edu.cn/ubuntu/ precise-proposed main restricted universe multiverse

大连理工大学更新服务器（仅教育网可以访问），包含其他开源镜像： ( IPv4/v6 Both )

deb http://mirror.dlut.edu.cn/ubuntu/ precise main restricted universe multiverse
deb http://mirror.dlut.edu.cn/ubuntu/ precise-security main restricted universe multiverse
deb http://mirror.dlut.edu.cn/ubuntu/ precise-updates main restricted universe multiverse
deb http://mirror.dlut.edu.cn/ubuntu/ubuntu precise-backports main restricted universe multiverse
deb http://mirror.dlut.edu.cn/ubuntu/ precise-proposed main restricted universe multiverse
deb-src http://mirror.dlut.edu.cn/ubuntu/ precise main restricted universe multiverse
deb-src http://mirror.dlut.edu.cn/ubuntu/ precise-security main restricted universe multiverse
deb-src http://mirror.dlut.edu.cn/ubuntu/ precise-updates main restricted universe multiverse
deb-src http://mirror.dlut.edu.cn/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://mirror.dlut.edu.cn/ubuntu/ precise-proposed main restricted universe multiverse

上海交通大学更新服务器（教育网千兆接入，联通/电信线路情况不详），包含其他开源镜像：

deb http://ftp.sjtu.edu.cn/ubuntu/ precise main multiverse restricted universe
deb http://ftp.sjtu.edu.cn/ubuntu/ precise-backports main multiverse restricted universe
deb http://ftp.sjtu.edu.cn/ubuntu/ precise-proposed main multiverse restricted universe
deb http://ftp.sjtu.edu.cn/ubuntu/ precise-security main multiverse restricted universe
deb http://ftp.sjtu.edu.cn/ubuntu/ precise-updates main multiverse restricted universe
deb-src http://ftp.sjtu.edu.cn/ubuntu/ precise main multiverse restricted universe
deb-src http://ftp.sjtu.edu.cn/ubuntu/ precise-backports main multiverse restricted universe
deb-src http://ftp.sjtu.edu.cn/ubuntu/ precise-proposed main multiverse restricted universe
deb-src http://ftp.sjtu.edu.cn/ubuntu/ precise-security main multiverse restricted universe
deb-src http://ftp.sjtu.edu.cn/ubuntu/ precise-updates main multiverse restricted universe

IPv6地址

deb http://ftp6.sjtu.edu.cn/ubuntu/ precise main multiverse restricted universe
deb http://ftp6.sjtu.edu.cn/ubuntu/ precise-backports main multiverse restricted universe
deb http://ftp6.sjtu.edu.cn/ubuntu/ precise-proposed main multiverse restricted universe
deb http://ftp6.sjtu.edu.cn/ubuntu/ precise-security main multiverse restricted universe
deb http://ftp6.sjtu.edu.cn/ubuntu/ precise-updates main multiverse restricted universe
deb-src http://ftp6.sjtu.edu.cn/ubuntu/ precise main multiverse restricted universe
deb-src http://ftp6.sjtu.edu.cn/ubuntu/ precise-backports main multiverse restricted universe
deb-src http://ftp6.sjtu.edu.cn/ubuntu/ precise-proposed main multiverse restricted universe
deb-src http://ftp6.sjtu.edu.cn/ubuntu/ precise-security main multiverse restricted universe
deb-src http://ftp6.sjtu.edu.cn/ubuntu/ precise-updates main multiverse restricted universe

厦门大学更新服务器，由厦门大学信息与网络中心维护，包含其他开源镜像： (IPv4/v6 Both)

deb http://mirrors.xmu.edu.cn/ubuntu/archive/ precise main restricted universe multiverse
deb http://mirrors.xmu.edu.cn/ubuntu/archive/ precise-backports restricted universe multiverse
deb http://mirrors.xmu.edu.cn/ubuntu/archive/ precise-proposed main restricted universe multiverse
deb http://mirrors.xmu.edu.cn/ubuntu/archive/ precise-security main restricted universe multiverse
deb http://mirrors.xmu.edu.cn/ubuntu/archive/ precise-updates main restricted universe multiverse
deb-src http://mirrors.xmu.edu.cn/ubuntu/archive/ precise main restricted universe multiverse
deb-src http://mirrors.xmu.edu.cn/ubuntu/archive/ precise-backports main restricted universe multiverse
deb-src http://mirrors.xmu.edu.cn/ubuntu/archive/ precise-proposed main restricted universe multiverse
deb-src http://mirrors.xmu.edu.cn/ubuntu/archive/ precise-security main restricted universe multiverse
deb-src http://mirrors.xmu.edu.cn/ubuntu/archive/ precise-updates main restricted universe multiverse

成都市电子科技大学更新服务器，由电子科大学生宿舍网管会维护。仅包括 Ubuntu 镜像： (IPv4 Only)

deb http://ubuntu.dormforce.net/ubuntu/ precise main multiverse restricted universe
deb http://ubuntu.dormforce.net/ubuntu/ precise-backports main multiverse restricted universe
deb http://ubuntu.dormforce.net/ubuntu/ precise-proposed main multiverse restricted universe
deb http://ubuntu.dormforce.net/ubuntu/ precise-security main multiverse restricted universe
deb http://ubuntu.dormforce.net/ubuntu/ precise-updates main multiverse restricted universe
deb-src http://ubuntu.dormforce.net/ubuntu/ precise main multiverse restricted universe
deb-src http://ubuntu.dormforce.net/ubuntu/ precise-backports main multiverse restricted universe
deb-src http://ubuntu.dormforce.net/ubuntu/ precise-proposed main multiverse restricted universe
deb-src http://ubuntu.dormforce.net/ubuntu/ precise-security main multiverse restricted universe
deb-src http://ubuntu.dormforce.net/ubuntu/ precise-updates main multiverse restricted universe

上述地址不通，可换用 uestc.edu.cn 域名尝试

deb http://ubuntu.uestc.edu.cn/ubuntu/ precise main multiverse restricted universe
deb http://ubuntu.uestc.edu.cn/ubuntu/ precise-backports main multiverse restricted universe
deb http:/ubuntu.uestc.edu.cn/ubuntu/ precise-proposed main multiverse restricted universe
deb http://ubuntu.uestc.edu.cn/ubuntu/ precise-security main multiverse restricted universe
deb http://ubuntu.uestc.edu.cn/ubuntu/ precise-updates main multiverse restricted universe
deb-src http://ubuntu.uestc.edu.cn/ubuntu/ precise main multiverse restricted universe
deb-src http://ubuntu.uestc.edu.cn/ubuntu/ precise-backports main multiverse restricted universe
deb-src http://ubuntu.uestc.edu.cn/ubuntu/ precise-proposed main multiverse restricted universe
deb-src http://ubuntu.uestc.edu.cn/ubuntu/ precise-security main multiverse restricted universe
deb-src http://ubuntu.uestc.edu.cn/ubuntu/ precise-updates main multiverse restricted universe

西南林业大学更新服务器，只包括当前稳定版和开发版，不包括 LTS 镜像。由西南林业大学计信学院维护。包括 Debian 镜像：

deb http://cs3.swfu.edu.cn/ubuntu/ precise main multiverse restricted universe
deb http://cs3.swfu.edu.cn/ubuntu/ precise-backports main multiverse restricted universe
deb http://cs3.swfu.edu.cn/ubuntu/ precise-proposed main multiverse restricted universe
deb http://cs3.swfu.edu.cn/ubuntu/ precise-security main multiverse restricted universe
deb http://cs3.swfu.edu.cn/ubuntu/ precise-updates main multiverse restricted universe
deb-src http://cs3.swfu.edu.cn/ubuntu/ precise main multiverse restricted universe
deb-src http://cs3.swfu.edu.cn/ubuntu/ precise-backports main multiverse restricted universe
deb-src http://cs3.swfu.edu.cnubuntu/ precise-proposed main multiverse restricted universe
deb-src http://cs3.swfu.edu.cn/ubuntu/ precise-security main multiverse restricted universe
deb-src http://cs3.swfu.edu.cn/ubuntu/ precise-updates main multiverse restricted universe

以下为大陆地区外的源

台湾（中华民国）的官方源。速度有时甚至快于内地的，包含 Debian 等其他镜像：

deb http://tw.archive.ubuntu.com/ubuntu precise main restricted universe multiverse
deb http://tw.archive.ubuntu.com/ubuntu precise-security main restricted universe multiverse
deb http://tw.archive.ubuntu.com/ubuntu precise-updates main restricted universe multiverse
deb http://tw.archive.ubuntu.com/ubuntu precise-backports main restricted universe multiverse
deb http://tw.archive.ubuntu.com/ubuntu precise-proposed main restricted universe multiverse
deb-src http://tw.archive.ubuntu.com/ubuntu precise main restricted universe multiverse
deb-src http://tw.archive.ubuntu.com/ubuntu precise-security main restricted universe multiverse
deb-src http://tw.archive.ubuntu.com/ubuntu precise-updates main restricted universe multiverse
deb-src http://tw.archive.ubuntu.com/ubuntu precise-backports main restricted universe multiverse
deb-src http://tw.archive.ubuntu.com/ubuntu precise-proposed main restricted universe multiverse

其他台湾源可以参考正体中文站Wiki

备注：

• 失效的服务器：
  1. 西南大学开源社区维护的西南大学镜像中已经取消了主要发行版镜像，但有一些学习资源。
  2. Geekbone.org更新服务器（上海电信服务器，由 SHLUG /上海Linux用户群维护）。
  3. 青岛大学更新服务器（青岛移动专线/教育网双线服务器，电信/网通用户亦适合），由 OSQDU维护，位于青岛大学。包含 Opera, CPAN, CTAN, IETF, Cygwin, 马克思主义文库等其他镜像。 北方地区访问速度较快。
  4. 北京化工大学更新服务器（仅教育网可以访问），包含 CentOS 镜像。
  5. 天津大学更新服务器，由天津大学自由软件联盟维护，包含其他开源镜像。
  6. 兰州大学更新服务器，由兰大开源社区维护，包含其他开源镜像。
  7. 上述服务器部分可能改为校内/地区访问。

• 各大镜像站点往往包括 Ubuntu 以外的大量其他自由软件资源，文中已注出。

• 其他软件源如 Medibuntu、Getdeb 等可参考香港自由软件社团维护的Wiki 中打开。