CREATEUSER(1) PostgreSQL Client Applications CREATEUSER(1)
createuser - define a new PostgreSQL user account
createuser [ options... ] [ username ]
createuser creates a new PostgreSQL user. Only superusers (users with usesuper set in the
pg_shadow table) can create new PostgreSQL users, so createuser must be invoked by someone
who can connect as a PostgreSQL superuser.
Being a superuser also implies the ability to bypass access permission checks within the
database, so superuserdom should not be granted lightly.
createuser is a shell script wrapper around the SQL command CREATE USER [create_user(7)]
via the PostgreSQL interactive terminal psql(1). Thus, there is nothing special about cre-
ating users via this or other methods. This means that the psql application must be found
by the script and that a database server must be running at the targeted host. Also, any
default settings and environment variables used by psql and the libpq front-end library
createuser accepts the following command-line arguments:
Specifies the name of the PostgreSQL user to be created. This name must be unique
among all PostgreSQL users.
The new user is allowed to create other users. (Note: Actually, this makes the new
user a superuser. The option is poorly named.)
The new user is not allowed to create other users (i.e., the new user is a regular
user, not a superuser).
The new user is allowed to create databases.
The new user is not allowed to create databases.
--echo Echo the queries that createuser generates and sends to the server.
Encrypts the user's password stored in the database. If not specified, the default
Allows you to pick a non-default user ID for the new user. This is not necessary,
but some people like it.
Does not encrypt the user's password stored in the database. If not specified, the
default is used.
If given, createuser will issue a prompt for the password of the new user. This is
not necessary if you do not plan on using password authentication.
Do not display a response.
You will be prompted for a name and other missing information if it is not specified on
the command line.
createuser also accepts the following command-line arguments for connection parameters:
Specifies the host name of the machine on which the server is running. If host
begins with a slash, it is used as the directory for the Unix domain socket.
Specifies the Internet TCP/IP port or local Unix domain socket file extension on
which the server is listening for connections.
User name to connect as (not the user name to create)
Force password prompt (to connect to the server, not for the password of the new
PGUSER Default connection parameters
All is well.
createuser: creation of user "username" failed
Something went wrong. The user was not created.
If there is an error condition, the backend error message will be displayed. See CREATE
USER [create_user(7)] and psql(1) for possibilities.
To create a user joe on the default database server:
$ createuser joe
Is the new user allowed to create databases? (y/n) n
Shall the new user be allowed to create more new users? (y/n) n
To create the same user joe using the server on host eden, port 5000, avoiding the prompts
and taking a look at the underlying query:
$ createuser -p 5000 -h eden -D -A -e joe
CREATE USER "joe" NOCREATEDB NOCREATEUSER
dropuser(1), CREATE USER [create_user(7)]
Application 2002-11-22 CREATEUSER(1)