gpg --gen-key fails

[Ladislav Hagara]

> Hi,
> I'm trying to generate a gpg key with
> Code:
> gpg --gen-key
> but i receive a message like (transtation):
> writable public keyring not found : eof
> what i'm supposed to do?

Just trying:

$ mkdir .gnupg
$ chmod 555 .gnupg/
$ gpg --gen-key
...
*gpg: no writable public keyring found: eof*
Key generation failed: eof
gpg: can't create `/home/user01/.gnupg/random_seed': Permission denied

Seems something with permissions.
What operating systems (Unix like, Windows)?

-- 
Ladislav Hagara