In this recipe, we will show you two ways of creating a new database user, one with a dedicated command-line utility and one using SQL commands.
To create new users, you must either be a superuser or have the CREATEROLE or CREATEROLE privilege.
From the command line, you can run the createuser command:
pguser@hvost:~$ createuser bobIf you add the --interactive command-line option, you activate the interactive mode, which means you will be asked some questions, as follows:
pguser@hvost:~$ createuser --interactive alice Shall the new role be a superuser? (y/n) n Shall the new role be allowed to create databases? (y/n) y Shall the new role be allowed to create more new roles? (y/n) n
Without --interactive, the preceding questions get no as the default answer; you can change that with the -s, -d, and -r command-line options.
In interactive mode, questions are asked only if they make sense. One example is when the user is a superuser; no other questions...