Question: how to change xsa_admin password?
Answer: Change the XSA_ADMIN user password for SystemDB : hdbsql -i 90 -d SystemDB -u XSA_ADMIN -p HXEHana1. Follow the command prompts to update the password. ... 
Change the XSA_DEV password for SystemDB . ... 
Change the XSA_SHINE password for SystemDB .