UPDATE: Section 3.1.4 Resetting the SYSTEM User's Password in the admin guide for SP7 discusses how to do this: http://help.sap.com/hana/SAP_HANA_Administration_Guide_en.pdf
Props to Lloyd Palfrey for his video. Thought I'd create a searchable document to outline this process.
Reset HANA SYSTEM user password
- SSH to the HANA system and login as root
- SU to the <sid>adm user
- Identify running HANA services
- Stop the HANA server
- Verify services are no longer running
- Start the name server service – this may not get back to a prompt
- Start index server. Run command even though may not be at a prompt.
- Reset password for user SYSTEM
- Stop hdbindexserver service by hitting Ctrl-C
- Kill hdbnameserver service
- killall -9 hdbnameserver
- Verify all HDB services are stopped
- Start HANA
- ./HDB start
- Verify HANA services are running
- Update password in HANA studio