Default Passwd for Postgres?

Hi: I'm running SuSE7.1Pro Ed and downloaded postgresql. There's a lot of confusion on my part about what SuSE did with the handling of files, but more immediate is to clear up the part about what the password is, when I type the command, $ su - postgres Password: su: incorrect password Any experts out there install this, and if so, what documentation did you follow? I can't get a handle on where the SuSE install stops and the documentation continues. For example, looks like it's installed in /var/lib/pgsql, and pgaccess is in /usr/lib/pgsql, and commands are in /usr/include/pgsql/commands. Thanks, Tom