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 CREATEUSER privilege.
From the command line, you can run the createuser command:
pguser@hvost:~$ createuser bob
If 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 -, -d, and -r command-line options.
In interactive mode, questions are asked only if they make sense. One example is the case when the user will be a superuser...