After deployment to IBM Spectrum Copy Data Management 2.2.5.0 GA, RPM updates can be installed as follows:

1) Login to the IBM Spectrum Copy Data Management Appliance with root login.
2) Using scp, copy all <rpm> files to "/" location.
3) Execute "rpm -Uvh <rpm>" separately for all rpms. Note that the rpms can be updated in any order. 
4) Restart virgo as shown below:

  service virgo stop
  service virgo start