Don't succedd in initializing database

Hi, all,

I tried several times to initialize the database, but I didn't succeed.

Here's what I typed on the CygWin prompt:

-------------------- Schnipp! --------------------

bash-2.05b$ ls -lisa
total 317
165189 0 drwxrwxrwx+ 5 Administ Benutzer 4096 Oct 1 00:55 .
3761467680 0 drwxrwxrwx+ 14 Administ Benutzer 4096 Aug 18 07:50 ..
157377 0 drwxrwxrwx+ 2 Administ Benutzer 8192 Oct 1 00:55 contrib
157419 38 -rwxrwxrwx 1 Administ Benutzer 38176 Aug 5 15:31 conversion_create.sql
169165 0 d---------+ 2 postgres Kein 0 Aug 18 08:07 data
3761333996 0 drwxrwxrwx+ 2 Administ Benutzer 0 Oct 1 00:55 java
157425 3 -rwxrwxrwx 1 Administ Benutzer 2329 Aug 5 15:31 pg_hba.conf.sample
157426 2 -rwxrwxrwx 1 Administ Benutzer 1441 Aug 5 15:31 pg_ident.conf.sample
157427 221 -rwxrwxrwx 1 Administ Benutzer 225499 Aug 5 15:31 postgres.bki
157429 48 -rwxrwxrwx 1 Administ Benutzer 48711 Aug 5 15:31 postgres.description
157430 5 -rwxrwxrwx 1 Administ Benutzer 5043 Aug 5 15:31 postgresql.conf.sample
bash-2.05b$ initdb -D /usr/share/postgresql/data
grep: not found
grep: not found
The files belonging to this database system will be owned by user "postgres".
This user must also own the server process.

The database cluster will be initialized with locale C.

Fixing permissions on existing directory /usr/share/postgresql/data... \c
chmod: changing permissions of `/usr/share/postgresql/data': Permission denied

initdb failed.
bash-2.05b$ whoami
postgres

-------------------- Schnapp! --------------------

Some questions:
1) What does the "initdb" message "This user must also own the server process." mean?
2) Why do I get the error message "Permission denied" during the execution of "initdb"?
3) Why does "initdb" want to change the permission of:
/usr/share/postgresql/data
This directory is already owned by "postgres"...

Thank you in advance for your help..

Kind regards
Stephan Rupp

--

Stephan Rupp
- Philologe / Netzwerkspezialist -
Mirabeauweg 4
D-72 072 Tübingen
Tel.: +49 (7071) 84093
Fax: +49 (7071) 84048
E-Post: stephan(dot)rupp(at)gmx(dot)net
stephan(dot)michael(dot)rupp(at)t-online(dot)de