Use the operating system user
postgres to create your database – as long as you haven’t set up a database role with the necessary privileges that corresponds to your operating system user of the same name (
h9uest in your case):
sudo -u postgres -i
Then try again. Type
exit when done with operating as system user
Or execute the single command
sudo, like demonstrated by drees in another answer.
The point is to use the operating system user matching the database role of the same name to be granted access via
postgres is the default operating system user to have initialized the database cluster. The manual:
In order to bootstrap the database system, a freshly initialized
system always contains one predefined role. This role is always a
“superuser”, and by default (unless altered when running
will have the same name as the operating system user that initialized
the database cluster. Customarily, this role will be named
In order to create more roles you first have to connect as this
I have heard of odd setups with non-standard user names or where the operating system user does not exist. You’d need to adapt your strategy there.
Read about database roles and client authentication in the manual.