Can user accounts be managed via the command line?

Solution 1:

To create an account in the Users folder

dscl / -create /Users/addfromcli

Create and set the shell property to bash.

dscl / -create /Users/addfromcli UserShell /bin/bash

Create and set the user’s full name. (Displayed in some of the panels/login screen)

dscl / -create /Users/addfromcli RealName "Added From Cli"

Create and set the user’s ID. (this is the unique id, you need to find out what id your last user create was and add one)

dscl / -create /Users/addfromcli UniqueID 503

Create and set the user’s group ID property. (This can be your default group)

dscl / -create /Users/addfromcli PrimaryGroupID 1000

Create and set the user home directory.

dscl / -create /Users/addfromcli NFSHomeDirectory /Local/Users/addfromcli

Set the password. (dont use password as a password)

dscl / -passwd /Users/addfromcli PASSWORD

Some more details can be found on OS X Daily

Solution by @Infamy seems to be for 10.5.

On OS X 10.6 each line needs to be changed to look like the following:

sudo dscl localhost -create /Local/Default/Users/addusername

That is, replace / by localhost, prepend /Local/Default to /Users and invoke the entire command with sudo.