Hello,

I have a box server, running samba and nfs.

the several linux boxes clients are with /etc/fstab mounting /home
the problem is that the chown 100X:100X is based and can change on the machine.

Can we bind the /etc/passwd and /etc/shadow to the samba password/logings for those linux clients?
so that : one unique password everywehere
then whatever users will have same password on anymachine. This means everyone can check his mails on any machines.

Yes, use smbpasswd

I made a picture of what I would be pleased to achieve:
http://yellowprotoss.ye.funpic.org/w...ver_logins.JPG

for clarity. is this possible with samba to change the /etc/shadow and /etc/passwd automatically which are located on the server?

You might want to look at centralizing user authentication with LDAP. It works pretty well for me at work. I am not sure if there's any way to do it directly with SAMBA (I think running a domain controller might only be supported in the next version), however SAMBA can authenticate credentials against LDAP.

Long and short, if you need to refer to /etc/passwd you're already toast. What you need to do is configure your system to authenticate against a centralized source (usually LDAP these days). This is easily done by setting up the central service, modifying /etc/nsswitch.conf and (possibly) uysing some NSCD and/or PAM magic to tell programs such as passwd, chsh, etc. about the change.