Hi Sebastian,
Of course the program hdbsdautil is not in the home directory, as it resides in the exe directory of the SAP HANA software.
server:/usr/sap/HBW/HDB10> which hdbsdautil
/usr/sap/HBW/HDB10/exe/hdbsdautil
server:/usr/sap/HBW/HDB10>
It seems it was not included in the initial SP07 release of HANA 1.0 and an update to the latest version on SP07, which is Rev. 73 is anyway recommended.
Best Regards Roland