Ubantu14.04使用wifi上网速度慢解决办法（更新源）

先说一说图形界面修改源，将默认的源修改成一个比较快的源。

图形界面就可以修改，打开Ubuntu软件中心，，点击顶部面板的“编辑”然后就可看到“软件源”选项了：

点击之后填出软件源编辑窗口，选择“其他站点”

可以选择最佳服务器，也可以直接在左边选择一个你觉得快的源，我比较喜欢163.com

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:

 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:


 注意：一定要选对版本然后，刷新列表:

sudo apt-get update

 注意：一定要执行刷新

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 multiversedeb http://archive.ubuntu.com/ubuntu/ trusty-security main restricted universe multiversedeb http://archive.ubuntu.com/ubuntu/ trusty-updates main restricted universe multiversedeb http://archive.ubuntu.com/ubuntu/ trusty-proposed main restricted universe multiversedeb http://archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiversedeb-src http://archive.ubuntu.com/ubuntu/ trusty main restricted universe multiversedeb-src http://archive.ubuntu.com/ubuntu/ trusty-security main restricted universe multiversedeb-src http://archive.ubuntu.com/ubuntu/ trusty-updates main restricted universe multiversedeb-src http://archive.ubuntu.com/ubuntu/ trusty-proposed main restricted universe multiversedeb-src http://archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverseUbuntu官方提供的其他软件（第三方闭源软件等）：
deb http://archive.canonical.com/ubuntu/ trusty partnerdeb http://extras.ubuntu.com/ubuntu/ trusty main
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 multiversedeb http://mirrors.163.com/ubuntu/ trusty-security main restricted universe multiversedeb http://mirrors.163.com/ubuntu/ trusty-updates main restricted universe multiversedeb http://mirrors.163.com/ubuntu/ trusty-proposed main restricted universe multiversedeb http://mirrors.163.com/ubuntu/ trusty-backports main restricted universe multiversedeb-src http://mirrors.163.com/ubuntu/ trusty main restricted universe multiversedeb-src http://mirrors.163.com/ubuntu/ trusty-security main restricted universe multiversedeb-src http://mirrors.163.c 4000
om/ubuntu/ trusty-updates main restricted universe multiversedeb-src http://mirrors.163.com/ubuntu/ trusty-proposed main restricted universe multiversedeb-src http://mirrors.163.com/ubuntu/ trusty-backports main r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 universedeb http://debian.ustc.edu.cn/ubuntu/ trusty-backports main multiverse restricted universedeb http://debian.ustc.edu.cn/ubuntu/ trusty-proposed main multiverse restricted universedeb http://debian.ustc.edu.cn/ubuntu/ trusty-security main multiverse restricted universedeb http://debian.ustc.edu.cn/ubuntu/ trusty-updates main multiverse restricted universedeb-src http://debian.ustc.edu.cn/ubuntu/ trusty main multiverse restricted universedeb-src http://debian.ustc.edu.cn/ubuntu/ trusty-backports main multiverse restricted universedeb-src http://debian.ustc.edu.cn/ubuntu/ trusty-proposed main multiverse restricted universedeb-src http://debian.ustc.edu.cn/ubuntu/ trusty-security main multiverse restricted universedeb-src http://debian.ustc.edu.cn/ubuntu/ trusty-updates main multiverse restricted universeIPv6-Only 地址
deb http://mirrors6.ustc.edu.cn/ubuntu/ trusty main multiverse restricted universedeb http://mirrors6.ustc.edu.cn/ubuntu/ trusty-backports main multiverse restricted universedeb http://mirrors6.ustc.edu.cn/ubuntu/ trusty-proposed main multiverse restricted universedeb http://mirrors6.ustc.edu.cn/ubuntu/ trusty-security main multiverse restricted universedeb http://mirrors6.ustc.edu.cn/ubuntu/ trusty-updates main multiverse restricted universedeb-src http://mirrors6.ustc.edu.cn/ubuntu/ trusty main multiverse restricted universedeb-src http://mirrors6.ustc.edu.cn/ubuntu/ trusty-backports main multiverse restricted universedeb-src http://mirrors6.ustc.edu.cn/ubuntu/ trusty-proposed main multiverse restricted universedeb-src http://mirrors6.ustc.edu.cn/ubuntu/ trusty-security main multiverse restricted universedeb-src http://mirrors6.ustc.edu.cn/ubuntu/ trusty-updates main multiverse restricted universestricted universe multiverse