Postgresql initial configuration: How to access as the postgres user?

Question

After installing postgresql, I tried it out, typing createdb mydb, like it\'s written in the documentation. Then the following error occured:

createdb: could not         


        

Answer 1

if the db is owned by user postgres you can do the following

createdb -U postgres dbname

since by default postgresql will trust connections from localhost.

Answer 2

su - postgres

and after you have been logged in:

createdb mydb