I cannot change owner and group of a directory or a file on a samba server. I tried with a win client and smbclient. Both the server and the smbclient are stock Ubuntu lucid amd64 servers smbd -V Version 3.4.7 Here are the relevant config: #----------------------- smbconf #------------------ [global] server string = %h server (Samba, Ubuntu) map to guest = Bad User obey pam restrictions = Yes pam password change = Yes passwd program = /usr/bin/passwd %u passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* . unix password sync = Yes syslog = 0 log file = /var/log/samba/log.%m max log size = 1000 dns proxy = No usershare allow guests = Yes panic action = /usr/share/samba/panic-action %d acl check permissions = No force create mode = 0660 force directory mode = 0770 [common] path = /srv/samba/common read only = No #----------------------- /etc/passwd #------------------ usercommon1:x:1004:1004:,,,:/srv/samba/common:/bin/bash common:x:2033:2034:,,,:/srv/samba/common/:/bin/bash #----------------------- /var/lib/samba/passdb.tdb #------------------ common:2033:XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX:58D0B7426D3D476339F7411C6EEBBC3B:[U ]:LCT-4C7C09ED: usercommon1:1004:XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX:7D7300E0DEF9143D4AC33EF8FAF9EF86:[U ]:LCT-4C3B20E0: #----------------------- ll -d /srv/samba/common/ and test/ #------------------ drwxr-xr-x 12 usercommon1 usercommon1 4096 2010-08-31 21:54 /srv/samba/common/ drwxrwxrwx 2 common common 4096 2010-08-31 21:54 /srv/samba/common/test/ #----------------------- Now, doing #------------------ nicolas at i27:~$ smbclient -U usercommon1 \\\\server\\common passwd smb: \> stat test File: \test Size: 0 Blocks: 0 directory Inode: 7471243 Links: 2 Access: (0777/drwxrwxrwx) Uid: 2033 Gid: 2034 Access: 2010-08-31 22:16:37 +0200 Modify: 2010-08-31 21:54:34 +0200 Change: 2010-08-31 22:16:17 +0200 smb: \> chown 1004 1004 test NT_STATUS_ACCESS_DENIED chown file \test uid=1004, gid=1004 What did I miss? N.