Ecco cosa compare quando provo a disinstallare :
antonino@antonino-laptop:~$ sudo '/opt/ibm/db2/V9.7/install/db2_deinstall' -a
DBI1016I Program db2_deinstall is performing uninstallation. Please
The deinstallation process cannot continue while there are DB2 instances related to the current DB2 copy.
If you need to move up or down a level from this DB2 level, use the installFixPack command from the DB2 image for the level you desire to move to, which will update this copy.
If you are only trying to uninstall this DB2 copy, you must either drop the related instances first, or you can update the instances to another DB2 copy which is at the same version as this DB2 copy, then restart the db2_deinstall command.
A major error occurred during the execution that caused this program to
terminate prematurely. If the problem persists, contact your technical service
For more information see the DB2 uninstallation log at