Login Failed with Existing User on PostgreSQL

Question

I just started playing around with PostgreSQL. My goal is to create a new user outside of postgres with all of the same privileges and create a database for my ror app. I\'m abl

Answer 1

You are confusing system user with database user. The error message comes from sudo and has nothing to do with PostgreSQL at all.

To log in as database user Jason:

psql -U Jason

You need to supply a password, of course, as long as password-less access is not set up. Peer authentication only works for a system user of the same name ("Jason").
More in the excellent manual about psql here and about authentication methods here.