一、开启windows 的linux子系统的功能模块

二、在 Microsoft Store 下载liunx系统安装，目前有Ubuntu 或KALI linux 或Debian三种常用系统 可以下载安装。

三、子系统的相关设置（以Ubuntu）为例子

1、到这一步Linux已经启用成功了，后续是设置

如果出现下面的提示错误

2、WSL1安装Mongodb永远无法启动，于是按照网上的教程，升级到了WSL2。在升级了WSL2以后重新安装Ubuntu20.04 时遇到问题，安装完成后无法正常启动。

解决方法是

造成该问题的原因是WSL版本由原来的WSL1升级到WSL2后，内核没有升级，前往微软WSL官网下载安装适用于 x64 计算机的最新 WSL2 Linux 内核更新包即可。

下载链接：https://wslstorestorage.blob.core.windows.net/wslblob/wsl_update_x64.msi

3、解决后，进行root用户密码设置以及设置用户及密码，到此，子系统的安装完成

Enter new UNIX username: deray     #设置用户名       
New password:                      #设置密码
Retype new password:               #重复输入密码
passwd: password updated successfully    #提示成功创建用户
Installation successful!
To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.

Welcome to Ubuntu 20.04.3 LTS (GNU/Linux 5.10.16.3-microsoft-standard-WSL2 x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage

  System information as of Sat Oct 23 20:00:16 CST 2021

  System load:  0.19               Processes:             8
  Usage of /:   0.5% of 250.98GB   Users logged in:       0
  Memory usage: 1%                 IPv4 address for eth0: 172.28.136.16
  Swap usage:   0%

1 update can be applied immediately.
To see these additional updates run: apt list --upgradable

The list of available updates is more than a week old.
To check for new updates run: sudo apt update

This message is shown once a day. To disable it please create the
/home/deray/.hushlogin file.

deray@DeRay:~$ sudo passwd root    #设置root用户的密码
New password:                      #输入密码
Retype new password:               #重新输入密码
passwd: password updated successfully
deray@DeRay:~$ su - root
Password:
Welcome to Ubuntu 20.04.3 LTS (GNU/Linux 5.10.16.3-microsoft-standard-WSL2 x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage

  System information as of Sat Oct 23 20:04:26 CST 2021

  System load:  0.0                Processes:             10
  Usage of /:   0.5% of 250.98GB   Users logged in:       0
  Memory usage: 1%                 IPv4 address for eth0: 172.28.136.16
  Swap usage:   0%

1 update can be applied immediately.
To see these additional updates run: apt list --upgradable


The list of available updates is more than a week old.
To check for new updates run: sudo apt update


This message is shown once a day. To disable it please create the
/root/.hushlogin file.
root@DeRay:~# pwd
/root
root@DeRay:~# apt upgrade             #更新 APT版本
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

4、对子系统进行优化

cd / 进入根目录

windows系统磁盘挂载在 /mnt/ 目录下

cd /mnt/ 然后ll 一下可以看到挂载的磁盘

其余操作同Linux，为方便进入桌面，可创建到桌面的软连接

ln -s /mnt/Users/（替换为你的路径）/Desktop （注意 在home目录下执行此命令）

新建文件夹mkdir或文件touch，操作同Linux