saturn:~# /usr/share/opennms/bin/install -disU
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OpenNMS Installer Version $Id: Installer.java 3056 2006-03-26 19:39:16Z djgregor $
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Configures PostgreSQL tables, users, and other miscellaneous settings.

Exception in thread "main" org.postgresql.util.PSQLException: A connection error has occurred: org.postgresql.util.PSQLException: FATAL: IDENT authentication failed for user "postgres"

        at org.postgresql.jdbc1.AbstractJdbc1Connection.openConnectionV3(AbstractJdbc1Connection.java:337)
        at org.postgresql.jdbc1.AbstractJdbc1Connection.openConnection(AbstractJdbc1Connection.java:214)
        at org.postgresql.Driver.connect(Driver.java:139)
        at java.sql.DriverManager.getConnection(DriverManager.java:512)
        at java.sql.DriverManager.getConnection(DriverManager.java:171)
        at org.opennms.install.Installer.databaseConnect(Installer.java:616)
        at org.opennms.install.Installer.install(Installer.java:195)
        at org.opennms.install.Installer.main(Installer.java:2453)