说明

win10内置ubuntu默认镜像源下载速度比较慢，更换一个国内的镜像源。

• 1.备份/etc/apt/sources.list文件：sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak
• 2.输入命令cd /etc/apt/和sudo vim sources.list,将下面的命令拷贝进去即可。
  清华源：

# 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释
deb https://mirrors.tuna.tsinghua.edu/ubuntu/ xenial main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu/ubuntu/ xenial main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu/ubuntu/ xenial-updates main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu/ubuntu/ xenial-updates main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu/ubuntu/ xenial-backports main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu/ubuntu/ xenial-backports main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu/ubuntu/ xenial-security main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu/ubuntu/ xenial-security main restricted universe multiverse

# 预发布软件源，不建议启用
# deb https://mirrors.tuna.tsinghua.edu/ubuntu/ xenial-proposed main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu/ubuntu/ xenial-proposed main restricted universe multiverse

阿里云18：

deb http://mirrors.aliyun/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.aliyun/ubuntu/ bionic main restricted universe multiverse

deb http://mirrors.aliyun/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.aliyun/ubuntu/ bionic-security main restricted universe multiverse

deb http://mirrors.aliyun/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.aliyun/ubuntu/ bionic-updates main restricted universe multiverse

deb http://mirrors.aliyun/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun/ubuntu/ bionic-proposed main restricted universe multiverse

deb http://mirrors.aliyun/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.aliyun/ubuntu/ bionic-backports main restricted universe multiverse

• 3.输入命令sudo apt-get update，完毕。