You can use the net user command to create and modify user accounts on computers. When you use this command without command-line switches, the user accounts for the computer are listed. The user account information is stored in the user accounts database. This command works only on servers.
To run the net user command tool, using the WinX menu, open a Command Prompt, type net user and hit Enter. This will show you the user accounts on the computer. Thus, when you use net user without parameters, it displays a list of the user accounts on the computer.
The sytax for its usage is:
net user [<UserName> {<Password> | *} [<Options>]] [/domain]
net user [<UserName> {<Password> | *} /add [<Options>] [/domain]]
net user [<UserName> [/delete] [/domain]]
Using net user with the appropriate parameters allows you to carry out several functions. You can use the following parameters with the net user command:
username is the name of the user account you want to add, delete, modify, or view.
As an example let us say you want to change the password of a user. To change a user’s password, log on as an administrator, open an elevated command prompt type the following and press Enter:
net user user_name * /domain
You will be asked to type a password for the user. Type the new password and later again retype the password to confirm. The password will now be changed.
You could also use the following command. But this case, you will not be prompted. The password will be directly changed right away:
net user user_name new_password
Amongst many such things, you can also use net user to:
原文：http://www.cnblogs.com/dennysong/p/5133406.html