I'm trying to install samba, but it fails:
kavinlu@kavinlu-IT:/etc/init.d$ sudo apt-get -f install samba4
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
libdcerpc-server0 libdcerpc0 libgensec0 libregistry0 libsamba-policy0 python-samba samba4-common-bin
Suggested packages:
bind9 phpldapadmin samba-gtk swat2
Recommended packages:
samba4-dsdb-modules
The following NEW packages will be installed:
libdcerpc-server0 libdcerpc0 libgensec0 libregistry0 libsamba-policy0 python-samba samba4 samba4-common-bin
0 upgraded, 8 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/4,143 kB of archives.
After this operation, 23.2 MB of additional disk space will be used.
Do you want to continue [Y/n]? y
Preconfiguring packages ...
Selecting previously deselected package libgensec0.
(Reading database ... 207432 files and directories currently installed.)
Unpacking libgensec0 (from .../libgensec0_4.0.0~alpha17~git20110807.dfsg1-1ubuntu1_amd64.deb) ...
Selecting previously deselected package libdcerpc0.
Unpacking libdcerpc0 (from .../libdcerpc0_4.0.0~alpha17~git20110807.dfsg1-1ubuntu1_amd64.deb) ...
Selecting previously deselected package libregistry0.
Unpacking libregistry0 (from .../libregistry0_4.0.0~alpha17~git20110807.dfsg1-1ubuntu1_amd64.deb) ...
Selecting previously deselected package libdcerpc-server0.
Unpacking libdcerpc-server0 (from .../libdcerpc-server0_4.0.0~alpha17~git20110807.dfsg1-1ubuntu1_amd64.deb) ...
Selecting previously deselected package libsamba-policy0.
Unpacking libsamba-policy0 (from .../libsamba-policy0_4.0.0~alpha17~git20110807.dfsg1-1ubuntu1_amd64.deb) ...
Selecting previously deselected package python-samba.
Unpacking python-samba (from .../python-samba_4.0.0~alpha17~git20110807.dfsg1-1ubuntu1_amd64.deb) ...
Selecting previously deselected package samba4-common-bin.
Unpacking samba4-common-bin (from .../samba4-common-bin_4.0.0~alpha17~git20110807.dfsg1-1ubuntu1_amd64.deb) ...
Selecting previously deselected package samba4.
Unpacking samba4 (from .../samba4_4.0.0~alpha17~git20110807.dfsg1-1ubuntu1_amd64.deb) ...
Processing triggers for man-db ...
Processing triggers for ureadahead ...
Setting up libgensec0 (4.0.0~alpha17~git20110807.dfsg1-1ubuntu1) ...
Setting up libdcerpc0 (4.0.0~alpha17~git20110807.dfsg1-1ubuntu1) ...
Setting up libregistry0 (4.0.0~alpha17~git20110807.dfsg1-1ubuntu1) ...
Setting up libdcerpc-server0 (4.0.0~alpha17~git20110807.dfsg1-1ubuntu1) ...
Setting up libsamba-policy0 (4.0.0~alpha17~git20110807.dfsg1-1ubuntu1) ...
Setting up python-samba (4.0.0~alpha17~git20110807.dfsg1-1ubuntu1) ...
Setting up samba4-common-bin (4.0.0~alpha17~git20110807.dfsg1-1ubuntu1) ...
Setting up samba4 (4.0.0~alpha17~git20110807.dfsg1-1ubuntu1) ...
Administrator password will be set randomly!
Unknown parameter encountered: "max log size"
Ignoring unknown parameter "max log size"
Unknown parameter encountered: "syslog"
Ignoring unknown parameter "syslog"
Unknown parameter encountered: "passdb backend"
Ignoring unknown parameter "passdb backend"
Unknown parameter encountered: "unix password sync"
Ignoring unknown parameter "unix password sync"
Unknown parameter encountered: "passwd program"
Ignoring unknown parameter "passwd program"
Unknown parameter encountered: "pam password change"
Ignoring unknown parameter "pam password change"
Unknown parameter encountered: "map to guest"
Ignoring unknown parameter "map to guest"
Unknown parameter encountered: "usershare allow guests"
Ignoring unknown parameter "usershare allow guests"
Unknown parameter encountered: "guest ok"
Ignoring unknown parameter "guest ok"
Unknown parameter encountered: "guest ok"
Ignoring unknown parameter "guest ok"
Unknown parameter encountered: "max log size"
Ignoring unknown parameter "max log size"
Unknown parameter encountered: "syslog"
Ignoring unknown parameter "syslog"
Unknown parameter encountered: "passdb backend"
Ignoring unknown parameter "passdb backend"
Unknown parameter encountered: "unix password sync"
Ignoring unknown parameter "unix password sync"
Unknown parameter encountered: "passwd program"
Ignoring unknown parameter "passwd program"
Unknown parameter encountered: "pam password change"
Ignoring unknown parameter "pam password change"
Unknown parameter encountered: "map to guest"
Ignoring unknown parameter "map to guest"
Unknown parameter encountered: "usershare allow guests"
Ignoring unknown parameter "usershare allow guests"
Unknown parameter encountered: "guest ok"
Ignoring unknown parameter "guest ok"
Unknown parameter encountered: "guest ok"
Ignoring unknown parameter "guest ok"
ProvisioningError: guess_names: 'realm =' was not specified in supplied /etc/samba/smb.conf. Please remove the smb.conf file and let provision generate it
dpkg: error processing samba4 (--configure):
subprocess installed post-installation script returned error exit status 1
Processing triggers for libc-bin ...
ldconfig deferred processing now taking place
Processing triggers for python-support ...
Errors were encountered while processing:
samba4
E: Sub-process /usr/bin/dpkg returned an error code (1)
What's going wrong? How do I fix it?