How do I export data from Oracle 11.1 to 10.1? I have a 11.1 oracle server and I need to export a dump file for a client who has a 10.1 server. 

While reading the documentation, I figured out I needed the 10.1 Export Utility. I searched the Oracle site and I couln't find it. 

How can I get this utility?
Thanks
To do this, you'll be wanting to use the 11.1 Data Pump (expdp/impdp) rather than exp/imp. With Data Pump you export using the higher version export utility with the VERSION= parameter.

For example:

expdp scott/tiger version=10.1 directory=DUMPDIR dumpfile=DUMPFILE.dmp logfile=DUMP.log

Don't forget to create the directory (using CREATE DIRECTORY DUMPDIR AS '/path/to/dir';) first.