-a
    This option specifies that the username following should be added to the local smbpasswd file, with
    the new password typed (type <Enter> for the old password). This option is ignored if the username
    following already exists in the smbpasswd file and it is treated like a regular change password
    command. Note that the default passdb backends require the user to already exist in the system
    password file (usually /etc/passwd), else the request to add the user will fail.

    This option is only available when running smbpasswd as root.

-c
    This option can be used to specify the path and file name of the smb.conf configuration file when it
    is important to use other than the default file and / or location.

-x
    This option specifies that the username following should be deleted from the local smbpasswd file.

    This option is only available when running smbpasswd as root.

-d
    This option specifies that the username following should be disabled in the local smbpasswd file.
    This is done by writing a ´D´ flag into the account control space in the smbpasswd file. Once this is
    done all attempts to authenticate via SMB using this username will fail.

    If the smbpasswd file is in the ´old´ format (pre-Samba 2.0 format) there is no space in the user´s
    password entry to write this information and the command will FAIL. See smbpasswd(5) for details on
    the ´old´ and new password file formats.

    This option is only available when running smbpasswd as root.

-e
    This option specifies that the username following should be enabled in the local smbpasswd file, if
    the account was previously disabled. If the account was not disabled this option has no effect. Once
    the account is enabled then the user will be able to authenticate via SMB once again.

    If the smbpasswd file is in the ´old´ format, then smbpasswd will FAIL to enable the account. See
    smbpasswd(5) for details on the ´old´ and new password file formats.

    This option is only available when running smbpasswd as root.

-D debuglevel
    debuglevel is an integer from 0 to 10. The default value if this parameter is not specified is zero.

    The higher this value, the more detail will be logged to the log files about the activities of
    smbpasswd. At level 0, only critical errors and serious warnings will be logged.

    Levels above 1 will generate considerable amounts of log data, and should only be used when
    investigating a problem. Levels above 3 are designed for use only by developers and generate HUGE
    amounts of log data, most of which is extremely cryptic.

-n
    This option specifies that the username following should have their password set to null (i.e. a
    blank password) in the local smbpasswd file. This is done by writing the string "NO PASSWORD" as the
    first part of the first password stored in the smbpasswd file.

    Note that to allow users to logon to a Samba server once the password has been set to "NO PASSWORD"
    in the smbpasswd file the administrator must set the following parameter in the [global] section of
    the smb.conf file :

    null passwords = yes

    This option is only available when running smbpasswd as root.

-r remote machine name
    This option allows a user to specify what machine they wish to change their password on. Without this
    parameter smbpasswd defaults to the local host. The remote machine name is the NetBIOS name of the
    SMB/CIFS server to contact to attempt the password change. This name is resolved into an IP address
    using the standard name resolution mechanism in all programs of the Samba suite. See the -R name
    resolve order parameter for details on changing this resolving mechanism.

    The username whose password is changed is that of the current UNIX logged on user. See the -U
    username parameter for details on changing the password for a different username.

    Note that if changing a Windows NT Domain password the remote machine specified must be the Primary
    Domain Controller for the domain (Backup Domain Controllers only have a read-only copy of the user
    account database and will not allow the password change).

    Note that Windows 95/98 do not have a real password database so it is not possible to change
    passwords specifying a Win95/98 machine as remote machine target.

-R name resolve order
    This option allows the user of smbpasswd to determine what name resolution services to use when
    looking up the NetBIOS name of the host being connected to.

-m
    This option tells smbpasswd that the account being changed is a MACHINE account. Currently this is
    used when Samba is being used as an NT Primary Domain Controller.

    This option is only available when running smbpasswd as root.

-U username
    This option may only be used in conjunction with the -r option. When changing a password on a remote
    machine it allows the user to specify the user name on that machine whose password will be changed.
    It is present to allow users who have different user names on different systems to change these
    passwords.

-h
    This option prints the help string for smbpasswd, selecting the correct one for running as root or as
    an ordinary user.

-s
    This option causes smbpasswd to be silent (i.e. not issue prompts) and to read its old and new
    passwords from standard input, rather than from /dev/tty (like the passwd(1) program does). This
    option is to aid people writing scripts to drive smbpasswd

-w password
    This parameter is only available if Samba has been compiled with LDAP support. The -w switch is used
    to specify the password to be used with the ldap admin dn. Note that the password is stored in the
    secrets.tdb and is keyed off of the admin´s DN. This means that if the value of ldap admin dn ever
    changes, the password will need to be manually updated as well.

-W
    NOTE: This option is same as "-w" except that the password should be entered using stdin.

    This parameter is only available if Samba has been compiled with LDAP support. The -W switch is used
    to specify the password to be used with the ldap admin dn. Note that the password is stored in the
    secrets.tdb and is keyed off of the admin´s DN. This means that if the value of ldap admin dn ever
    changes, the password will need to be manually updated as well.

-i
    This option tells smbpasswd that the account being changed is an interdomain trust account. Currently
    this is used when Samba is being used as an NT Primary Domain Controller. The account contains the
    info about another trusted domain.

    This option is only available when running smbpasswd as root.

-L
    Run in local mode.