[gpadmin@test-4 software]$ sudo rpm --install ./greenplum-db-6.9.0-rhel7-x86_64.rpm --prefix=/opt/gp/greenplum
[gpadmin@test-4 software]$ sudo chown -R gpadmin:gpadmin /opt/gp/greenplum
[gpadmin@test-4 software]$ source /opt/gp/greenplum/greenplum-db/greenplum_path.sh