FATAL: role "root" does not exist

[edwige]

I just installed PostgreSQL on ubuntu linux. the installer does everything for, but I try to use "createuser" I get this message: { FATAL: role "root" does not exist }

I have tried different suggestions from the Net, nothing seems to work. How do I correct the problem?

[rski]

Creating user should be done be user postgres. If u want to create user from the root account u should create it first using postgres account.