Question for IBM Universal Database Personal Developer edition

[Yasushi Okubo]

Hi,

I just installed IBM universal database Personal Developer edition [free 
trial version to our one of Redhat 7.3 machines.   I can bring up 
Control Center, but cannot start database instance.
It looks like it added the proper paths, but is not finding db2start script:

=== env ===
.......
PATH=/usr/kerberos/bin:/usr/local/bin:/bin:/usr/bin:/usr/X11R6/bin:/opt/IBMJava2-141/bin:/opt/IBMJava2-141/jre/bin:
/home/db2inst1/sqllib/bin:/home/db2inst1/sqllib/adm:/home/db2inst1/sqllib/misc:/home/db2inst1/bin
==========

I looked around with a find command, but no success.
Could someone tell me how it works ?

I simply used db2setup GUI to install db2 and create an instance.   
According to the IBM  manual, I should be able to start the instance, 
but it is not happening.

Thanks,
yasushi