> Yes, it is the password for PostgreSQL. > > pg_dump: [archiver (db)] connection to database "db123" failed: FATAL: > password authentication failed for user "postgres" > FATAL: password authentication failed for user "postgres" >
The error message says the authentication method used isn't trust. Can you tell us the complete content of your pg_hba.conf (without the comments of course), and the exact command lines (the one that work and the one that doesn't work).