WSL下的Ubuntu 18.04LTS配置软件源和系统更新
设置系统语言为中文
# 安装中文支持
sudo apt-get install -y language-pack-zh-hans
# 设置默认语言
sudo update-locale LANG=zh_CN.UTF-8
分别执行完上面的命令，关闭窗口，然后重新启动Ubuntu即可切换为中文。
更换软件源
1. 切换root用户
sudo -i
2. 备份当前软件源
mv /etc/apt/sources.list /etc/apt/sources.list.bak
3. 编辑软件源管理文件
vim /etc/apt/sources.list
下面是阿里云和网易云的镜像地址，任选其一粘贴至/etc/apt/sources.list保存退出即可
阿里云软件源：
deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
网易软件源：
deb http://mirrors.163.com/ubuntu/ bionic main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ bionic-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ bionic-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic-backports main restricted universe multiverse
4.更新软件列表和系统软件包
sudo apt-get update&& apt-get upgrade
至此，软件源的配置结束，快下载个软件试试你的网速有没有飞起来吧
PS：配置LNMP的方案新手我推荐宝塔面板，包含可视化操作面板的服务器环境，对小白用户非常友好，官网：https://www.bt.cn/ ，也欢迎转至宝塔面板7.2.0,宝塔5.9.2安装学习版。