Ubuntu系统自带的都是源国外的网址，大家都懂，在外网下载东西的时候肯定比较慢，十分痛苦，这里分享下如何将国外源换为过内源，让你的网速提高。嗖嗖嗖~~~
1. 备份原来的源
sudo cp /etc/apt/sources.list /etc/apt/sources_init.list
备份下，以防以后可以用。
2. 更换源
sudo gedit /etc/apt/sources.list
使用gedit打开文档，将下面的阿里源赋值进去，然后点击保存关闭（完全覆盖）。
注意：如果gedit未安装，会报错，先执行下sudo apt-get install gedit
需要复制的内容 阿里源：
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
3. 更新
更新源
sudo apt-get update
更新软件
sudo apt-get upgrade
到此就Over了。
来源：CSDN
作者：不卑不亢。。
链接：https://blog.csdn.net/qq_43437122/article/details/103600970