CREATEUSER(1)           PostgreSQL 9.4.5 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 9.4.5                     2015                        CREATEUSER(1)
