How can I rename a database?

From: Ron <ronyin_at_tpts5.seed.net.tw>
Date: Mon, 2 Apr 2001 14:52:19 +0800
Message-ID: <9a97fr$f0b@netnews.hinet.net>

I'm new to oracle.
I have a oracle8.0.5 on Aix4.3.
how can i rename a database name?
i saw some posts for renaming db with trace file. but i don't know how to use trace.
can someone help me?

the structure of datafiles are:
/oradata/testdb/control01.ctl
/oradata/testdb/control02.ctl
/oradata/testdb/control03.ctl
/oradata/testdb/index01.dbf
/oradata/testdb/rbs01.dbf
/oradata/testdb/redo01.log
/oradata/testdb/redo02.log
/oradata/testdb/redo03.log
/oradata/testdb/system01.dbf
/oradata/testdb/temp01.dbf
/oradata/testdb/tools01.dbf
/oradata/testdb/users01.dbf
Received on Mon Apr 02 2001 - 01:52:19 CDT