Oracle Database Express Edition (XE)

Hi,

what steps are necessary to run XE on port 80 on a Linux system?

exec dbms_xdb.sethttpport('80');
didn't work.

I have already tried to change the port using
exec dbms_xdb.sethttpport('8081');

and it worked immediately.
Seems to be the root issue with ports<1024

Have already tried the usual Apache stuff with the tnslsnr binary
[root@daust bin]# chown root tnslsnr
[root@daust bin]# chmod 6750 tnslsnr

But this only lead me to the following errors when restarting the listener:
/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/bin/tnslsnr: error while loading shared libraries: libclntsh.so.10.1: cannot open shared object file: No such file or directory
TNS-12547: TNS:lost contact
TNS-12560: TNS:protocol adapter error
TNS-00517: Lost contact
Linux Error: 32: Broken pipe
www:oraclexe[XE]> lsnrctl start


Is this possible?
How can I do it?

Thanks,
~Dietmar.