NAME¶

createuser - define a new PostgreSQL user account

SYNOPSIS¶

createuser [connection-option...] [option...] [username]

DESCRIPTION¶

createuser creates a new PostgreSQL user (or more precisely, a role). Only superusers and users with CREATEROLE privilege can create new users, so createuser must be invoked by someone who can connect as a superuser or a user with CREATEROLE privilege.

If you wish to create a new superuser, you must connect as a superuser, not merely with CREATEROLE privilege. Being a superuser implies the ability to bypass all access permission checks within the database, so superuserdom should not be granted lightly.

createuser is a wrapper around the SQL command CREATE ROLE (CREATE_ROLE(7)). There is no effective difference between creating users via this utility and via other methods for accessing the server.

OPTIONS¶

createuser accepts the following command-line arguments:

username

-c number, --connection-limit=number

-d, --createdb

-D, --no-createdb

-e, --echo

-E, --encrypted

-i, --inherit

-I, --no-inherit

--interactive

-l, --login

-L, --no-login

-N, --unencrypted

-P, --pwprompt

-r, --createrole

-R, --no-createrole

-s, --superuser

-S, --no-superuser

-V, --version

--replication

--no-replication

-?, --help

createuser also accepts the following command-line arguments for connection parameters:

-h host, --host=host

-p port, --port=port

-U username, --username=username

-w, --no-password

-W, --password

ENVIRONMENT¶

PGHOST, PGPORT, PGUSER

This utility, like most other PostgreSQL utilities, also uses the environment variables supported by libpq (see Section 31.14, “Environment Variables”, in the documentation).

DIAGNOSTICS¶

In case of difficulty, see CREATE ROLE (CREATE_ROLE(7)) and psql(1) for discussions of potential problems and error messages. The database server must be running at the targeted host. Also, any default connection settings and environment variables used by the libpq front-end library will apply.

EXAMPLES¶

To create a user joe on the default database server:

$ createuser joe

To create a user joe on the default database server with prompting for some additional attributes:

$ createuser --interactive joe
Shall the new role be a superuser? (y/n) n
Shall the new role be allowed to create databases? (y/n) n
Shall the new role be allowed to create more new roles? (y/n) n

To create the same user joe using the server on host eden, port 5000, with attributes explicitly specified, taking a look at the underlying command:

$ createuser -h eden -p 5000 -S -D -R -e joe
CREATE ROLE joe NOSUPERUSER NOCREATEDB NOCREATEROLE INHERIT LOGIN;

To create the user joe as a superuser, and assign a password immediately:

$ createuser -P -s -e joe
Enter password for new role: xyzzy
Enter it again: xyzzy
CREATE ROLE joe PASSWORD 'md5b5f5ba1a423792b526f799ae4eb3d59e' SUPERUSER CREATEDB CREATEROLE INHERIT LOGIN;

In the above example, the new password isn't actually echoed when typed, but we show what was typed for clarity. As you see, the password is encrypted before it is sent to the client. If the option --unencrypted is used, the password will appear in the echoed command (and possibly also in the server log and elsewhere), so you don't want to use -e in that case, if anyone else can see your screen.

SEE ALSO¶

dropuser(1), CREATE ROLE (CREATE_ROLE(7))