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man : createuser(1)

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CREATEUSER(1)                                    PostgreSQL 9.4.10 Documentation                                   CREATEUSER(1)



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
           Specifies the name of the PostgreSQL user to be created. This name must be different from all existing roles in this
           PostgreSQL installation.

       -c number
       --connection-limit=number
           Set a maximum number of connections for the new user. The default is to set no limit.

       -d
       --createdb
           The new user will be allowed to create databases.

       -D
       --no-createdb
           The new user will not be allowed to create databases. This is the default.

       -e
       --echo
           Echo the commands that createuser generates and sends to the server.

       -E
       --encrypted
           Encrypts the user's password stored in the database. If not specified, the default password behavior is used.

       -g role
       --role=role
           Indicates role to which this role will be added immediately as a new member. Multiple roles to which this role will
           be added as a member can be specified by writing multiple -g switches.

       -i
       --inherit
           The new role will automatically inherit privileges of roles it is a member of. This is the default.

       -I
       --no-inherit
           The new role will not automatically inherit privileges of roles it is a member of.

       --interactive
           Prompt for the user name if none is specified on the command line, and also prompt for whichever of the options
           -d/-D, -r/-R, -s/-S is not specified on the command line. (This was the default behavior up to PostgreSQL 9.1.)

       -l
       --login
           The new user will be allowed to log in (that is, the user name can be used as the initial session user identifier).
           This is the default.

       -L
       --no-login
           The new user will not be allowed to log in. (A role without login privilege is still useful as a means of managing
           database permissions.)

       -N
       --unencrypted
           Does not encrypt the user's password stored in the database. If not specified, the default password behavior is used.

       -P
       --pwprompt
           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.

       -r
       --createrole
           The new user will be allowed to create new roles (that is, this user will have CREATEROLE privilege).

       -R
       --no-createrole
           The new user will not be allowed to create new roles. This is the default.

       -s
       --superuser
           The new user will be a superuser.

       -S
       --no-superuser
           The new user will not be a superuser. This is the default.

       -V
       --version
           Print the createuser version and exit.

       --replication
           The new user will have the REPLICATION privilege, which is described more fully in the documentation for CREATE ROLE
           (CREATE_ROLE(7)).

       --no-replication
           The new user will not have the REPLICATION privilege, which is described more fully in the documentation for CREATE
           ROLE (CREATE_ROLE(7)).

       -?
       --help
           Show help about createuser command line arguments, and exit.

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

       -h host
       --host=host
           Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used
           as the directory for the Unix domain socket.

       -p port
       --port=port
           Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.

       -U username
       --username=username
           User name to connect as (not the user name to create).

       -w
       --no-password
           Never issue a password prompt. If the server requires password authentication and a password is not available by
           other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and
           scripts where no user is present to enter a password.

       -W
       --password
           Force createuser to prompt for a password (for connecting to the server, not for the password of the new user).

           This option is never essential, since createuser will automatically prompt for a password if the server demands
           password authentication. However, createuser will waste a connection attempt finding out that the server wants a
           password. In some cases it is worth typing -W to avoid the extra connection attempt.

ENVIRONMENT
       PGHOST
       PGPORT
       PGUSER
           Default connection parameters

       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))



PostgreSQL 9.4.10                                             2016                                                 CREATEUSER(1)


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