UNIX: Installing/Upgrading the Client Software 
The SAP DB software can be installed or upgraded interactively or in the background.
You have the following options:

On Linux operating systems, you can use the Red Hat Package Manager (RPM) to install the SAP DB software. If an RPM installation of the SAP DB software has been performed on Linux, you cannot additionally carry out an SDBINST installation or SDBINST upgrade on this host.