第一次启动会显示
Installing, this may take a few minutes...

等待几分钟后，提示新建用户名，也可以直接跳过
Installation successful!
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Enter registration code (leave empty to skip registration):

然后提示新建用户密码
New password:

提示确认再次输入密码
Retype new password:

设置成功后提示更新成功，是否将此密码设置为root账户密码，“y”确认，其它否
passwd: password updated successfully
Use same password for root user?
Type "y" to approve, any other key to reject:

输入“n”后提示输入root账户密码
Enter root password.
New password:

再次输入密码
Retype new password:

账户设置完成
passwd: password updated successfully
Default UNIX user set to: 你设置的用户名
你的用户名@DESKTOP-RSRAUIF:~>


注意：用户名不能与windows系统用户名相同
　　　　/usr/lib64/ruby/2.1.0/open3.rb:193: warning: Insecure world writable dir /mnt/c/ProgramData/Oracle/Java in PATH, mode 040777
　　　　command ‘dmidecode -s system-uuid‘ failed
　　　　Error: SCC returned ‘Unknown Registration Code.‘ (401)
　　　　错误: 0x80040305
　　　　Please create a default UNIX user account. The username does not need to match your Windows username.
　　　　For more information visit: https://aka.ms/wslusers
　　　　Enter new UNIX username:
     当密码太短或者太简单，会提示，但是不影响
　　　　BAD PASSWORD: it is too short
　　　　BAD PASSWORD: is too simple