在网上下载了一个ubuntu 14.04的镜像，我是在vmware虚拟机里安装的（我是在无网络情况下安装的，不知道有没有影响，可能在有网络安装系统的时候会更新一些东西），安装好了之后在终端里死活都apt-get install xxx下载安装不到任何软件（譬如vim也无法安装），紧接着就是百度，Google，说什么要apt-get update更新一下，我也更新了，但然并卵。。。最后皇天不负有心人，就看到了说要更新源的说法，就是要更新/etc/apt/sources.list文件里的内容，本人也试了一下，这种方法确实可以，于是乎就有了下面的内容了。

不同的网络状况连接以下源的速度不同, 建议在添加前手动验证以下源的连接速度(ping下就行),选择最快的源可以节省大批下载时间。

• 首先备份源列表：

sudo cp /etc/apt/sources.list /etc/apt/sources.list_backup

• 而后用gedit或其他编辑器打开（也可以复制到Windows下打开，修改后在放回Ubuntu里，方法很多，反正能修改里面的内容就是好方法）：

sudo gedit /etc/apt/sources.list

• 从下面列表中选择合适的源，替换掉文件中所有的内容，保存编辑好的文件:
• 然后刷新列表，注意一定要执行刷新：

sudo apt-get update

源列表

Trusty(14.04)版本

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、移动/铁通、联通等公网用户可以使用)：

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

骨头兄亲自搭建并维护的 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/ trusty main restricted universe multiverse
deb http://ubuntu.srt.cn/ubuntu/ trusty-security main restricted universe multiverse
deb http://ubuntu.srt.cn/ubuntu/ trusty-updates main restricted universe multiverse
deb http://ubuntu.srt.cn/ubuntu/ trusty-proposed main restricted universe multiverse
deb http://ubuntu.srt.cn/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://ubuntu.srt.cn/ubuntu/ trusty main restricted universe multiverse
deb-src http://ubuntu.srt.cn/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://ubuntu.srt.cn/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://ubuntu.srt.cn/ubuntu/ trusty-proposed main restricted universe multiverse
deb-src http://ubuntu.srt.cn/ubuntu/ trusty-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/ trusty main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ trusty-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ trusty-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ trusty-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ trusty main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ trusty-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ trusty-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/ trusty main restricted universe multiverse
deb http://mirrors.sohu.com/ubuntu/ trusty-security main restricted universe multiverse
deb http://mirrors.sohu.com/ubuntu/ trusty-updates main restricted universe multiverse
deb http://mirrors.sohu.com/ubuntu/ trusty-proposed main restricted universe multiverse
deb http://mirrors.sohu.com/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ trusty main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ trusty-proposed main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ trusty-backports main restricted universe multiverse

阿里云更新服务器（北京万网/浙江杭州阿里云服务器双线接入），包含其他开源镜像：

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

开源中国更新服务器（浙江杭州阿里云服务器），包含其他开源镜像：
(http 亦可替换为 ftp)

deb http://mirrors.oschina.net/ubuntu/ trusty main restricted universe multiverse
deb http://mirrors.oschina.net/ubuntu/ trusty-security main restricted universe multiverse
deb http://mirrors.oschina.net/ubuntu/ trusty-updates main restricted universe multiverse
deb http://mirrors.oschina.net/ubuntu/ trusty-proposed main restricted universe multiverse
deb http://mirrors.oschina.net/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://mirrors.oschina.net/ubuntu/ trusty main restricted universe multiverse
deb-src http://mirrors.oschina.net/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://mirrors.oschina.net/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://mirrors.oschina.net/ubuntu/ trusty-proposed main restricted universe multiverse
deb-src http://mirrors.oschina.net/ubuntu/ trusty-backports main restricted universe multiverse

中国开源软件中心更新服务器（北京光环新网服务器），包含其他开源镜像：

deb http://mirrors.oss.org.cn/ubuntu/ trusty main restricted universe multiverse
deb http://mirrors.oss.org.cn/ubuntu/ trusty-security main restricted universe multiverse
deb http://mirrors.oss.org.cn/ubuntu/ trusty-updates main restricted universe multiverse
deb http://mirrors.oss.org.cn/ubuntu/ trusty-proposed main restricted universe multiverse
deb http://mirrors.oss.org.cn/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://mirrors.oss.org.cn/ubuntu/ trusty main restricted universe multiverse
deb-src http://mirrors.oss.org.cn/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://mirrors.oss.org.cn/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://mirrors.oss.org.cn/ubuntu/ trusty-proposed main restricted universe multiverse
deb-src http://mirrors.oss.org.cn/ubuntu/ trusty-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 trusty main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu trusty-security main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu trusty-updates main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu trusty-backports main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu trusty-proposed main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu trusty main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu trusty-security main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu trusty-updates main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu trusty-backports main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu trusty-proposed main restricted universe multiverse

Linux运维派架设的更新服务器（北京阿里巴巴科技有限公司服务器），包含其他开源镜像：
（域名中的.cn可以替换为.com）

deb http://mirrors.skyshe.cn/ubuntu/ trusty main restricted universe multiverse
deb http://mirrors.skyshe.cn/ubuntu/ trusty-security main restricted universe multiverse
deb http://mirrors.skyshe.cn/ubuntu/ trusty-updates main restricted universe multiverse
deb http://mirrors.skyshe.cn/ubuntu/ trusty-proposed main restricted universe multiverse
deb http://mirrors.skyshe.cn/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://mirrors.skyshe.cn/ubuntu/ trusty main restricted universe multiverse
deb-src http://mirrors.skyshe.cn/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://mirrors.skyshe.cn/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://mirrors.skyshe.cn/ubuntu/ trusty-proposed main restricted universe multiverse
deb-src http://mirrors.skyshe.cn/ubuntu/ trusty-backports main restricted universe multiverse

北京首都在线科技股份有限公司 更新服务器，包含其他开源镜像：

deb http://mirrors.yun-idc.com/ubuntu/ trusty main restricted universe multiverse
deb http://mirrors.yun-idc.com/ubuntu/ trusty-security main restricted universe multiverse
deb http://mirrors.yun-idc.com/ubuntu/ trusty-updates main restricted universe multiverse
deb http://mirrors.yun-idc.com/ubuntu/ trusty-proposed main restricted universe multiverse
deb http://mirrors.yun-idc.com/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://mirrors.yun-idc.com/ubuntu/ trusty main restricted universe multiverse
deb-src http://mirrors.yun-idc.com/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://mirrors.yun-idc.com/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://mirrors.yun-idc.com/ubuntu/ trusty-proposed main restricted universe multiverse
deb-src http://mirrors.yun-idc.com/ubuntu/ trusty-backports main restricted universe multiverse

Linux Story 更新服务器，包含其他开源镜像：

deb http://mirrors.linuxstory.org/ubuntu/ trusty main restricted universe multiverse
deb http://mirrors.linuxstory.org/ubuntu/ trusty-security main restricted universe multiverse
deb http://mirrors.linuxstory.org/ubuntu/ trusty-updates main restricted universe multiverse
deb http://mirrors.linuxstory.org/ubuntu/ trusty-proposed main restricted universe multiverse
deb http://mirrors.linuxstory.org/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://mirrors.linuxstory.org/ubuntu/ trusty main restricted universe multiverse
deb-src http://mirrors.linuxstory.org/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://mirrors.linuxstory.org/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://mirrors.linuxstory.org/ubuntu/ trusty-proposed main restricted universe multiverse
deb-src http://mirrors.linuxstory.org/ubuntu/ trusty-backports 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营业地址相同。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 trusty main restricted universe multiverse
deb http://centos.bitcomm.cn/ubuntu trusty-security main restricted universe multiverse
deb http://centos.bitcomm.cn/ubuntu trusty-updates main restricted universe multiverse
deb http://centos.bitcomm.cn/ubuntu trusty-backports main restricted universe multiverse
deb http://centos.bitcomm.cn/ubuntu trusty-proposed main restricted universe multiverse
deb-src http://centos.bitcomm.cn/ubuntu trusty main restricted universe multiverse
deb-src http://centos.bitcomm.cn/ubuntu trusty-security main restricted universe multiverse
deb-src http://centos.bitcomm.cn/ubuntu trusty-updates main restricted universe multiverse
deb-src http://centos.bitcomm.cn/ubuntu trusty-backports main restricted universe multiverse
deb-src http://centos.bitcomm.cn/ubuntu trusty-proposed main restricted universe multiverse

以下为有教育网接入的服务器（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/ trusty main multiverse restricted universe
deb http://debian.ustc.edu.cn/ubuntu/ trusty-backports main multiverse restricted universe
deb http://debian.ustc.edu.cn/ubuntu/ trusty-proposed main multiverse restricted universe
deb http://debian.ustc.edu.cn/ubuntu/ trusty-security main multiverse restricted universe
deb http://debian.ustc.edu.cn/ubuntu/ trusty-updates main multiverse restricted universe
deb-src http://debian.ustc.edu.cn/ubuntu/ trusty main multiverse restricted universe
deb-src http://debian.ustc.edu.cn/ubuntu/ trusty-backports main multiverse restricted universe
deb-src http://debian.ustc.edu.cn/ubuntu/ trusty-proposed main multiverse restricted universe
deb-src http://debian.ustc.edu.cn/ubuntu/ trusty-security main multiverse restricted universe
deb-src http://debian.ustc.edu.cn/ubuntu/ trusty-updates main multiverse restricted universe

IPv6-Only 地址

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

IPv4-Only 地址

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

IPv6-Only 地址

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

中国地质大学开源镜像站，由中国地质大学 Linux 爱好者维护。包含其他开源镜像， (校外限 IPv6 访问)：

deb http://mirrors.cug.edu.cn/ubuntu/ trusty main restricted universe multiverse
deb http://mirrors.cug.edu.cn/ubuntu/ trusty-security main restricted universe multiverse
debhttp://mirrors.cug.edu.cn/ubuntu/ trusty-updates main restricted universe multiverse
deb http://mirrors.cug.edu.cn/ubuntu/ trusty-backports main restricted universe multiverse
deb http://mirrors.cug.edu.cn/ubuntu/ trusty-proposed main restricted universe multiverse
deb-src http://mirrors.cug.edu.cn/ubuntu/ trusty main restricted universe multiverse
deb-src http://mirrors.cug.edu.cn/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://mirrors.cug.edu.cn/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://mirrors.cug.edu.cn/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://mirrors.cug.edu.cn/ubuntu/ trusty-proposed main restricted universe multiverse

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

IPv6-Only 地址

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

北京理工大学更新服务器，包含其他开源镜像：

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

IPv6-Only 地址

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

天津大学更新服务器，由天津大学信息与网络协会和天津大学自由软件联盟维护，包含其他开源镜像 (校外限 IPv6 访问)
（域名可以替换为 jx.tju.zyrj.org 或 jx6.tju.zyrj.org）

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

山东理工大学更新服务器，包含其他开源镜像，限校内访问：

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

IPv6-Only 地址

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

IPv6-Only地址

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

大连理工大学更新服务器，包含其他开源镜像：
( IPv4/v6 Both )

deb http://mirror.dlut.edu.cn/ubuntu/ trusty main restricted universe multiverse
deb http://mirror.dlut.edu.cn/ubuntu/ trusty-security main restricted universe multiverse
deb http://mirror.dlut.edu.cn/ubuntu/ trusty-updates main restricted universe multiverse
deb http://mirror.dlut.edu.cn/ubuntu/ubuntu trusty-backports main restricted universe multiverse
deb http://mirror.dlut.edu.cn/ubuntu/ trusty-proposed main restricted universe multiverse
deb-src http://mirror.dlut.edu.cn/ubuntu/ trusty main restricted universe multiverse
deb-src http://mirror.dlut.edu.cn/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://mirror.dlut.edu.cn/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://mirror.dlut.edu.cn/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://mirror.dlut.edu.cn/ubuntu/ trusty-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：
(http 亦可替换为 ftp))

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

IPv6-Only 地址

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

江苏开放大学更新服务器，由江苏开放大学技术中心维护，包含其他开源镜像：

deb http://mirrors.jstvu.edu.cn/ubuntu/ trusty main restricted universe multiverse
deb http://mirrors.jstvu.edu.cn/ubuntu/ trusty-backports restricted universe multiverse
deb http://mirrors.jstvu.edu.cn/ubuntu/ trusty-proposed main restricted universe multiverse
deb http://mirrors.jstvu.edu.cn/ubuntu/ trusty-security main restricted universe multiverse
deb http://mirrors.jstvu.edu.cn/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://mirrors.jstvu.edu.cn/ubuntu/ trusty main restricted universe multiverse
deb-src http://mirrors.jstvu.edu.cn/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://mirrors.jstvu.edu.cn/ubuntu/ trusty-proposed main restricted universe multiverse
deb-src http://mirrors.jstvu.edu.cn/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://mirrors.jstvu.edu.cn/ubuntu/ trusty-updates main restricted universe multiverse

南京师范大学更新服务器，包含其他开源镜像，限校内访问：

deb http://mirrors.njnu.edu.cn/ubuntu/ trusty main restricted universe multiverse
deb http://mirrors.njnu.edu.cn/ubuntu/ trusty-backports restricted universe multiverse
deb http://mirrors.njnu.edu.cn/ubuntu/ trusty-proposed main restricted universe multiverse
deb http://mirrors.njnu.edu.cn/ubuntu/ trusty-security main restricted universe multiverse
deb http://mirrors.njnu.edu.cn/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://mirrors.njnu.edu.cn/ubuntu/ trusty main restricted universe multiverse
deb-src http://mirrors.njnu.edu.cn/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://mirrors.njnu.edu.cn/ubuntu/ trusty-proposed main restricted universe multiverse
deb-src http://mirrors.njnu.edu.cn/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://mirrors.njnu.edu.cn/ubuntu/ trusty-updates main restricted universe multiverse

浙江大学更新服务器，由浙江大学Linux用户组维护，包含其他开源镜像：
（域名可以替换为mirrors.zju.edu.cn）
( IPv4/v6 Both )

deb http://mirrors.zjustu.org/ubuntu/ trusty main restricted universe multiverse
deb http://mirrors.zjustu.org/ubuntu/ trusty-backports restricted universe multiverse
deb http://mirrors.zjustu.org/ubuntu/ trusty-proposed main restricted universe multiverse
deb http://mirrors.zjustu.org/ubuntu/ trusty-security main restricted universe multiverse
deb http://mirrors.zjustu.org/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://mirrors.zjustu.org/ubuntu/ trusty main restricted universe multiverse
deb-src http://mirrors.zjustu.org/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://mirrors.zjustu.org/ubuntu/ trusty-proposed main restricted universe multiverse
deb-src http://mirrors.zjustu.org/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://mirrors.zjustu.org/ubuntu/ trusty-updates main restricted universe multiverse

华中科技大学更新服务器，由华中科技大学网络与计算中心维护，包含其他开源镜像：

deb http://mirrors.hust.edu.cn/ubuntu/ trusty main restricted universe multiverse
deb http://mirrors.hust.edu.cn/ubuntu/ trusty-backports restricted universe multiverse
deb http://mirrors.hust.edu.cn/ubuntu/ trusty-proposed main restricted universe multiverse
deb http://mirrors.hust.edu.cn/ubuntu/ trusty-security main restricted universe multiverse
deb http://mirrors.hust.edu.cn/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://mirrors.hust.edu.cn/ubuntu/ trusty main restricted universe multiverse
deb-src http://mirrors.hust.edu.cn/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://mirrors.hust.edu.cn/ubuntu/ trusty-proposed main restricted universe multiverse
deb-src http://mirrors.hust.edu.cn/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://mirrors.hust.edu.cn/ubuntu/ trusty-updates main restricted universe multiverse

华中科大联创团队更新服务器，由华中科技大学启明学院 的联创团队维护，包含其他开源镜像：

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

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

中山大学更新服务器，由中山大学网络与信息技术中心维护，包含其他开源镜像：

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

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

电子科技大学（位于成都）更新服务器，由电子科技大学学生宿舍网络管理委员会维护，仅包含 Ubuntu 镜像：

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

电子科技大学另一更新服务器，由电子科大凝聚网络安全工作室维护，包含 Ubuntu 和 Raspian镜像，以及 Linux Deepin镜像：

deb http://ubuntu.cnssuestc.org/ubuntu/ trusty main restricted universe multiverse
deb http://ubuntu.cnssuestc.org/ubuntu/ trusty-backports main restricted universe multiverse
deb http://ubuntu.cnssuestc.org/ubuntu/ trusty-proposed main restricted universe multiverse
deb http://ubuntu.cnssuestc.org/ubuntu/ trusty-security main restricted universe multiverse
deb http://ubuntu.cnssuestc.org/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://ubuntu.cnssuestc.org/ubuntu/ trusty main restricted universe multiverse
deb-src http://ubuntu.cnssuestc.org/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://ubuntu.cnssuestc.org/ubuntu/ trusty-proposed main restricted universe multiverse
deb-src http://ubuntu.cnssuestc.org/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://ubuntu.cnssuestc.org/ubuntu/ trusty-updates main restricted universe multiverse

西安交通大学更新服务器，由西安交通大学众享社维护，包含其他开源镜像：

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

以下为大陆地区外的源

香港中文大学更新服务器，由香港中文大学资讯科技服务处维护，包含其他开源镜像：

deb http://ftp.cuhk.edu.hk/pub/Linux/ubuntu trusty main restricted universe multiverse
deb http://ftp.cuhk.edu.hk/pub/Linux/ubuntu trusty-security main restricted universe multiverse
deb http://ftp.cuhk.edu.hk/pub/Linux/ubuntu trusty-updates main restricted universe multiverse
deb http://ftp.cuhk.edu.hk/pub/Linux/ubuntu trusty-backports main restricted universe multiverse
deb http://ftp.cuhk.edu.hk/pub/Linux/ubuntu trusty-proposed main restricted universe multiverse
deb-src http://ftp.cuhk.edu.hk/pub/Linux/ubuntu trusty main restricted universe multiverse
deb-src http://ftp.cuhk.edu.hk/pub/Linux/ubuntu trusty-security main restricted universe multiverse
deb-src http://ftp.cuhk.edu.hk/pub/Linux/ubuntu trusty-updates main restricted universe multiverse
deb-src http://ftp.cuhk.edu.hk/pub/Linux/ubuntu trusty-backports main restricted universe multiverse
deb-src http://ftp.cuhk.edu.hk/pub/Linux/ubuntu trusty-proposed main restricted universe

台湾的官方源。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 trusty main restricted universe multiverse
deb http://tw.archive.ubuntu.com/ubuntu trusty-security main restricted universe multiverse
deb http://tw.archive.ubuntu.com/ubuntu trusty-updates main restricted universe multiverse
deb http://tw.archive.ubuntu.com/ubuntu trusty-backports main restricted universe multiverse
deb http://tw.archive.ubuntu.com/ubuntu trusty-proposed main restricted universe multiverse
deb-src http://tw.archive.ubuntu.com/ubuntu trusty main restricted universe multiverse
deb-src http://tw.archive.ubuntu.com/ubuntu trusty-security main restricted universe multiverse
deb-src http://tw.archive.ubuntu.com/ubuntu trusty-updates main restricted universe multiverse
deb-src http://tw.archive.ubuntu.com/ubuntu trusty-backports main restricted universe multiverse
deb-src http://tw.archive.ubuntu.com/ubuntu trusty-proposed main restricted universe multiverse

实在是太多太多太多······了。更详细可以访问原文地址：
http://wiki.ubuntu.org.cn/Qref/Source