Ubuntu安装后默认的官方源是美国的服务器，但是美国服务器在国内安装软件等会有较大的限制。所以我们需要将默认的源切换为国内源。一般来说，常用的国内源有阿里源（这是中国官方源）、网易源和搜狐源等等。除此之外，还有高校源，比如清华、中科大以及浙大等等。如果是在校学生，那么换成自己学校内部的源，更新和安装软件的速度会很快。如果是非校园网络，那么最推荐的就是阿里源。不同版本的Ubuntu系统的源列表不相同，在这里我只列举Ubuntu 14.04和Ubuntu 16.04两种系统的源列表。
1. 更换源的两种方式（1）打开系统设置选择，software&updates，如下：
然后在跳出来的框中点击选择”Download from：“选项
再点击other选项会出现一个choose a download server框并选择China，里面有很多国内服务器可选择。
（2）在sources.list文件中手动更改源，即将对应源列表中的代码复制到sources.list文件中，过程如下：
<1> 打开终端，通过cd指令进入sources.list文件所在目录。
$ cd /etc/apt
<2> 将原sources.list文件拷贝做备份，可以进入/etc/apt目录下看到有一个sources.list.bak文件。$ sudo cp sources.list sources.list.bak
<3> 通过gedit指令对sources.list进行编辑（也可以用vim指令），并将sources.list文件中的内容全选删除，再把对应的源列表的内容复制到文件中。
$ sudo gedit sources.list
<4>访问源列表里的网址，并读取软件列表，然后更新保存在本地电脑，换源结束。
$ sudo apt-get update
2. Ubuntu 14.04常用的源列表（1）阿里云源
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
（2）网易源
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
（3）教育网之浙大源
deb http://mirrors.zju.edu.cn/ubuntu/ trusty main multiverse restricted universe
deb http://mirrors.zju.edu.cn/ubuntu/ trusty-backports main multiverse restricted universe
deb http://mirrors.zju.edu.cn/ubuntu/ trusty-proposed main multiverse restricted universe
deb http://mirrors.zju.edu.cn/ubuntu/ trusty-security main multiverse restricted universe
deb http://mirrors.zju.edu.cn/ubuntu/ trusty-updates main multiverse restricted universe
deb-src http://mirrors.zju.edu.cn/ubuntu/ trusty main multiverse restricted universe
deb-src http://mirrors.zju.edu.cn/ubuntu/ trusty-backports main multiverse restricted universe
deb-src http://mirrors.zju.edu.cn/ubuntu/ trusty-proposed main multiverse restricted universe
deb-src http://mirrors.zju.edu.cn/ubuntu/ trusty-security main multiverse restricted universe
deb-src http://mirrors.zju.edu.cn/ubuntu/ trusty-updates main multiverse restricted universe
（4）教育网之中科大源
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
（5）教育网之清华源
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
3. Ubuntu 16.04常用的源列表（1）阿里云源
deb http://mirrors.aliyun.com/ubuntu/ xenial main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ xenial main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse
（2）网易源
deb http://mirrors.163.com/ubuntu/ xenial main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ xenial-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ xenial-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ xenial-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ xenial-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ xenial main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ xenial-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ xenial-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ xenial-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ xenial-backports main restricted universe multiverse
（3）教育网之浙大源
deb http://mirrors.zju.edu.cn/ubuntu xenial main universe restricted multiverse
deb http://mirrors.zju.edu.cn/ubuntu xenial-security main universe restricted multiverse
deb http://mirrors.zju.edu.cn/ubuntu xenial-updates main universe restricted multiverse
deb http://mirrors.zju.edu.cn/ubuntu xenial-proposed main universe restricted multiverse
deb http://mirrors.zju.edu.cn/ubuntu xenial-backports main universe restricted multiverse
deb-src http://mirrors.zju.edu.cn/ubuntu xenial main universe restricted multiverse
deb-src http://mirrors.zju.edu.cn/ubuntu xenial-security main universe restricted multiverse
deb-src http://mirrors.zju.edu.cn/ubuntu xenial-updates main universe restricted multiverse
deb-src http://mirrors.zju.edu.cn/ubuntu xenial-proposed main universe restricted multiverse
deb-src http://mirrors.zju.edu.cn/ubuntu xenial-backports main universe restricted multiverse
（4）教育网之中科大源
deb http://mirrors.ustc.edu.cn/ubuntu/ xenial main restricted universe multiverse
deb http://mirrors.ustc.edu.cn/ubuntu/ xenial-security main restricted universe multiverse
deb http://mirrors.ustc.edu.cn/ubuntu/ xenial-updates main restricted universe multiverse
deb http://mirrors.ustc.edu.cn/ubuntu/ xenial-proposed main restricted universe multiverse
deb http://mirrors.ustc.edu.cn/ubuntu/ xenial-backports main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu/ xenial main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu/ xenial-security main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu/ xenial-updates main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu/ xenial-proposed main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu/ xenial-backports main restricted universe multiverse
（5）教育网之清华源
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial main multiverse restricted universe
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-backports main multiverse restricted universe
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-proposed main multiverse restricted universe
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security main multiverse restricted universe
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates main multiverse restricted universe
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial main multiverse restricted universe
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-backports main multiverse restricted universe
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-proposed main multiverse restricted universe
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security main multiverse restricted universe
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates main multiverse restricted universe
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