perl -le 'use strict; use warnings; use DBI; my $h = DBI->connect("dbi:Oracle:host=fred.example.com;sid=fred", "xxx","yyy", {RaiseError => 0, PrintError => 0}) or die $DBI::errstr;' ORA-24327: need explicit attach before authenticating a user (DBD ERROR: OCISessionBegin) at -e line 1.