I am a Linux beginner. My question is about file access and Samba.The situation is:
User A and User B is in the same group. In a folder calls "public", I want to let both user can delete any files inside. I found that if a file is created by User A, even I change its mod to 0777, User B still cannot delete it, only can edit and save it. Must need User A or root to delete it. If User B access this file from other Windows OS through Samba, it seems even cannot edit it though I have set "writable = yes" for User B in smb.conf.
Is it a Linux security? Is there anyway that can reach my purpose to let both of them can create, edit and delete any file inside that folder?

You should be able to do it with the following:
- Put user A and user B in a common group, for example absamba;
- Change the group membership of the directory and the files it contains to absamba chgrp -R absamba directoryname;
- Force files created in the directory to keep their group membership with chmod g+s directoryname;
- Change your samba.conf so that the share containing the directory has force group = absamba
- Have a read through the options at http://us4.samba.org/samba/docs/using_samba/appb.html, including force create mode

Hope that helps...

Hi gilead,
Thanks for your quick help. I will try it and tell you the result.