我正在配置Samba并尝试添加域用户，但是它返回以下内容：
failed to add entry for the user student
到目前为止，这些是我已经完成的命令：
frigate@frigate-desktop:~$ su
Password:
root@frigate-desktop:/home/frigate# nano /etc/samba/smb.conf
root@frigate-desktop:/home/frigate# groupadd -g 201 machines
root@frigate-desktop:/home/frigate# mkdir -m 0775 /home/ntlogon
root@frigate-desktop:/home/frigate# mkdir /home/samba /home/samba/profiles
root@frigate-desktop:/home/frigate# chmod 1755 /home/samba/profiles/
root@frigate-desktop:/home/frigate# useradd -m test
root@frigate-desktop:/home/frigate# passwd test
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
root@frigate-desktop:/home/frigate# smbpasswd -a test
New SMB password:
Retype new SMB password:
Added user test.
root@frigate-desktop:/home/frigate# smbpasswd -a root
New SMB password:
Retype new SMB password:
Added user root.
root@frigate-desktop:/home/frigate# smbpasswd -a student
New SMB password:
Retype new SMB password:
Failed to add entry for user student.
root@frigate-desktop:/home/frigate# smbpasswd -a student
New SMB password:
Retype new SMB password:
Failed to add entry for user student.
root@frigate-desktop:/home/frigate# smbpasswd -a stu
New SMB password:
Retype new SMB password:
Mismatch - password unchanged.
Unable to get new password.
root@frigate-desktop:/home/frigate# smbpasswd -a stu
New SMB password:
Retype new SMB password:
Failed to add entry for user stu.
如何将此用户添加到Samba？