A user can be created in a single line command using the 'useradd' command in Linux.

• Use the 'useradd' command followed by the username to create a user.

• Specify additional options like home directory, ...read more

adduser < username> . This single line command use to create new user.

With root privilege

useradd <username>

with sudo privilege

sudo useradd <username>

sudo useradd -m [username]

to create newuser useradd command is used

To create any user the syntax should be useradd <username> 

To create any user the syntax should be  useradd <username>

useradd <user name>

this the command for create user

the simple format for this commad is "useradd"