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I need Samba to use a different set of credentials for home shares.

The shell login password is different from the Samba login password.

I have disabled the unix password sync option, but the Samba password eventually gets replaced by the shell login password.

Is there anything I missed, or is what I'm trying to do not possible?

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2 Answers

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Your Samba password is replaced because you have pam_smbpasswd enabled in your PAM configuration. When used in the auth group, this module automatically updates the Samba account upon logging in. If you disable it, your passwords will remain separate.

The unix password sync option is for the opposite direction – it causes the Unix password to be updated when Samba is told to change its own account database.

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I don't see pam_smbpasswd (or pam_smbpass) anywhere in the configuration file. Google also turned up nothing actionable. – Kevin Herrera Nov 15 '11 at 16:30
By "the file", do you mean "all files in /etc/pam.d" or something else? – grawity Nov 15 '11 at 16:44
Both /etc/pam.d/samba and /etc/samba/smb.conf. In case it helps, I'm running Ubuntu Server 10.04 LTS with Samba 3.4.7. In the pam.d one, I see 3 @include statements. – Kevin Herrera Nov 16 '11 at 17:06
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/etc/pam.d/samba is only used when logging in over Samba, and I'm talking about normal system logins, so check the entire pam.d directory. (The smb.conf file is irrelevant.) – grawity Nov 16 '11 at 22:19
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PAM handles user logins and only that. It's not used when restarting the entire system. PAM is, however, used when you log in to the system or when you unlock the screensaver. – grawity Nov 18 '11 at 16:43
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Use this command

smbpasswd -a homeuser

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