ctdb: Use str_list_add_printf() in debug_locks_args()

[samba4-gss.git] / docs-xml / manpages / smbpasswd.8.xml

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<!DOCTYPE refentry PUBLIC "-//Samba-Team//DTD DocBook V4.2-Based Variant V1.0//EN" "http://www.samba.org/samba/DTD/samba-doc">
<refentry id="smbpasswd.8">

<refmeta>
        <refentrytitle>smbpasswd</refentrytitle>
        <manvolnum>8</manvolnum>
        <refmiscinfo class="source">Samba</refmiscinfo>
        <refmiscinfo class="manual">System Administration tools</refmiscinfo>
        <refmiscinfo class="version">&doc.version;</refmiscinfo>
</refmeta>


<refnamediv>
        <refname>smbpasswd</refname>
        <refpurpose>change a user's SMB password</refpurpose>
</refnamediv>

<refsynopsisdiv>
        <cmdsynopsis>
                <command>smbpasswd</command>
                <arg choice="opt">-a</arg>      
                <arg choice="opt">-c &lt;config file&gt;</arg>  
                <arg choice="opt">-x</arg>      
                <arg choice="opt">-d</arg>      
                <arg choice="opt">-e</arg>      
                <arg choice="opt">-D debuglevel</arg>   
                <arg choice="opt">-n</arg>      
                <arg choice="opt">-r &lt;remote machine&gt;</arg>       
                <arg choice="opt">-R &lt;name resolve order&gt;</arg>   
                <arg choice="opt">-m</arg>      
                <arg choice="opt">-U username[%password]</arg>  
                <arg choice="opt">-h</arg>      
                <arg choice="opt">-s</arg>      
                <arg choice="opt">-w pass</arg> 
                <arg choice="opt">-W</arg>
                <arg choice="opt">-i</arg>
                <arg choice="opt">-L</arg>
                <arg choice="opt">username</arg>        
        </cmdsynopsis>
</refsynopsisdiv>

<refsect1>
        <title>DESCRIPTION</title>

        <para>This tool is part of the <citerefentry><refentrytitle>samba</refentrytitle>
        <manvolnum>7</manvolnum></citerefentry> suite.</para>
        
        <para>The smbpasswd program has several different 
        functions, depending on whether it is run by the <emphasis>root</emphasis> user 
        or not. When run as a normal user it allows the user to change 
        the password used for their SMB sessions on any machines that store 
        SMB passwords. </para>

        <para>By default (when run with no arguments) it will attempt to 
        change the current user's SMB password on the local machine. This is 
        similar to the way the <command>passwd(1)</command> program works. <command>
        smbpasswd</command> differs from how the passwd program works 
        however in that it is not <emphasis>setuid root</emphasis> but works in 
        a client-server mode and communicates with a 
        locally running <citerefentry><refentrytitle>smbd</refentrytitle>
        <manvolnum>8</manvolnum></citerefentry>. As a consequence in order for this to 
        succeed the smbd daemon must be running on the local machine. On a 
        UNIX machine the encrypted SMB passwords are usually stored in 
        the default passdb backend.</para>

        <para>When run by an ordinary user with no options, smbpasswd 
        will prompt them for their old SMB password and then ask them 
        for their new password twice, to ensure that the new password
        was typed correctly. No passwords will be echoed on the screen 
        whilst being typed. If you have a blank SMB password (specified by 
        the string "NO PASSWORD" in the smbpasswd file) then just press 
        the &lt;Enter&gt; key when asked for your old password. </para>

        <para>smbpasswd can also be used by a normal user to change their
        SMB password on remote machines, such as Windows NT Primary Domain 
        Controllers.   See the (<parameter>-r</parameter>) and <parameter>-U</parameter> options 
        below. </para>

        <para>When run by root, smbpasswd allows new users to be added 
        and deleted in the smbpasswd file, as well as allows changes to 
        the attributes of the user in this file to be made. When run by root, <command>
        smbpasswd</command> accesses the local smbpasswd file 
        directly, thus enabling changes to be made even if smbd is not 
        running. </para>
</refsect1>

<refsect1>
        <title>OPTIONS</title>
        <variablelist>
                <varlistentry>
                <term>-a</term>
                <listitem><para>
                This option specifies that the username following should be added to the local smbpasswd file, with the new
                password typed (type &lt;Enter&gt; 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
                <filename>/etc/passwd</filename>), else the request to add the user will fail.
                </para>
                
                <para>This option is only available when running smbpasswd 
                as root. </para></listitem>
                </varlistentry>
                

                <varlistentry>
                <term>-c</term>
                <listitem><para>
                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.
                </para></listitem>
                </varlistentry>
                
                
                <varlistentry>
                <term>-x</term>
                <listitem><para>
                This option specifies that the username following should be deleted from the local smbpasswd file.
                </para>

                <para>
                This option is only available when running smbpasswd as root.
                </para></listitem>
                </varlistentry>
                
                
                
                <varlistentry>
                <term>-d</term>
                <listitem><para>This option specifies that the username following 
                should be <constant>disabled</constant> in the local smbpasswd 
                file. This is done by writing a <constant>'D'</constant> 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. </para>
                
                <para>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 <citerefentry><refentrytitle>smbpasswd</refentrytitle>
                <manvolnum>5</manvolnum></citerefentry> for details on the 'old' and new password file formats.
                </para>

                <para>This option is only available when running smbpasswd as 
                root.</para></listitem>
                </varlistentry>
                
                
                <varlistentry>
                <term>-e</term>
                <listitem><para>This option specifies that the username following 
                should be <constant>enabled</constant> 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. </para>
                
                <para>If the smbpasswd file is in the 'old' format, then <command>
                smbpasswd</command> will FAIL to enable the account.  
                See <citerefentry><refentrytitle>smbpasswd</refentrytitle>
                <manvolnum>5</manvolnum></citerefentry> for 
                details on the 'old' and new password file formats. </para>

                <para>This option is only available when running smbpasswd as root. 
                </para></listitem>
                </varlistentry>
                


                <varlistentry>
                <term>-D debuglevel</term>
                <listitem><para><replaceable>debuglevel</replaceable> is an integer 
                from 0 to 10.  The default value if this parameter is not specified 
                is zero. </para>

                <para>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. </para>

                <para>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. 
                </para></listitem>
                </varlistentry>
                
                
                
                <varlistentry>
                <term>-n</term>
                <listitem><para>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. </para>

                <para>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 <filename>smb.conf</filename> file : </para>
                
                <para><command>null passwords = yes</command></para> 
                
                <para>This option is only available when running smbpasswd as 
                root.</para></listitem>
                </varlistentry>
                
                
                
                <varlistentry>
                <term>-r remote machine name</term>
                <listitem><para>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 <replaceable>remote 
                machine name</replaceable> 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 <parameter>-R 
                name resolve order</parameter> parameter for details on changing 
                this resolving mechanism. </para>

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

                <para>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).</para>
                
                <para><emphasis>Note</emphasis> 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. </para>
                </listitem>
                </varlistentry>
                
                
                <varlistentry>
                <term>-R name resolve order</term>
                <listitem><para>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. </para>

                <para>The options are :"lmhosts", "host", "wins" and "bcast". They
                 cause names to be resolved as follows: </para>
                        <itemizedlist>
                                <listitem><para><constant>lmhosts</constant>: Lookup an IP 
            address in the Samba lmhosts file. If the line in lmhosts has 
            no name type attached to the NetBIOS name (see the <citerefentry><refentrytitle>lmhosts</refentrytitle>
            <manvolnum>5</manvolnum></citerefentry> for details) then
            any name type matches for lookup.</para></listitem>

            <listitem><para><constant>host</constant>: Do a standard host 
            name to IP address resolution, using the system <filename>/etc/hosts
            </filename>, NIS, or DNS lookups. This method of name resolution 
            is operating system depended for instance on IRIX or Solaris this 
            may be controlled by the <filename>/etc/nsswitch.conf</filename> 
            file).  Note that this method is only used if the NetBIOS name 
            type being queried is the 0x20 (server) name type, otherwise 
            it is ignored.</para></listitem>

            <listitem><para><constant>wins</constant>: Query a name with 
            the IP address listed in the <parameter>wins server</parameter> 
            parameter.  If no WINS server has been specified this method 
            will be ignored.</para></listitem>

            <listitem><para><constant>bcast</constant>: Do a broadcast on 
            each of the known local interfaces listed in the
            <parameter>interfaces</parameter> parameter. This is the least 
            reliable of the name resolution methods as it depends on the 
            target host being on a locally connected subnet.</para></listitem>
                </itemizedlist>
                
                <para>The default order is <command>lmhosts, host, wins, bcast</command> 
                and without this parameter or any entry in the <citerefentry><refentrytitle>smb.conf</refentrytitle>
                <manvolnum>5</manvolnum></citerefentry> file the name resolution methods will 
                be attempted in this order. </para></listitem>
                </varlistentry>
                
                
                <varlistentry>
                <term>-m</term>
                <listitem><para>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.</para>

                <para>This option is only available when running smbpasswd as root.
                </para></listitem>
                </varlistentry>
                
                
                <varlistentry>
                <term>-U username</term>
                <listitem><para>This option may only be used in conjunction 
                with the <parameter>-r</parameter> 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. </para></listitem>
                </varlistentry>
                
                
                <varlistentry>
                <term>-h</term>
                <listitem><para>This option prints the help string for <command>
                smbpasswd</command>, selecting the correct one for running as root 
                or as an ordinary user. </para></listitem>
                </varlistentry>
                
                
                <varlistentry>
                <term>-s</term>
                <listitem><para>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 <filename>/dev/tty</filename> 
                (like the <command>passwd(1)</command> program does). This option 
                is to aid people writing scripts to drive smbpasswd</para>
                </listitem>
                </varlistentry>
                

                <varlistentry>
                <term>-w password</term>
                <listitem><para>This parameter is only available if Samba
                has been compiled with LDAP support. The <parameter>-w</parameter> 
                switch is used to specify the password to be used with the 
                <smbconfoption name="ldap admin dn"/>.  Note that the password is stored in
                the <filename>secrets.tdb</filename> and is keyed off
                of the admin's DN.  This means that if the value of <parameter>ldap
                admin dn</parameter> ever changes, the password will need to be 
                manually updated as well.
                </para>
                </listitem>
                </varlistentry>

                <varlistentry>
                <term>-W</term>
                <listitem><para><command>NOTE: </command> This option is same as "-w"
                except that the password should be entered using stdin.
                </para>
                <para>This parameter is only available if Samba
                has been compiled with LDAP support. The <parameter>-W</parameter>
                switch is used to specify the password to be used with the
                <smbconfoption name="ldap admin dn"/>.  Note that the password is stored in
                the <filename>secrets.tdb</filename> and is keyed off
                of the admin's DN.  This means that if the value of <parameter>ldap
                admin dn</parameter> ever changes, the password will need to be
                manually updated as well.
                </para>
                </listitem>
                </varlistentry>


                <varlistentry>
                <term>-i</term>
                <listitem><para>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.</para>

                <para>This option is only available when running smbpasswd as root.
                </para></listitem>
                </varlistentry>

                <varlistentry>
                <term>-L</term>
                <listitem><para>Run in local mode.</para></listitem>
                </varlistentry>
                
                <varlistentry>
                <term>username</term>
                <listitem><para>This specifies the username for all of the 
                <emphasis>root only</emphasis> options to operate on. Only root 
                can specify this parameter as only root has the permission needed 
                to modify attributes directly in the local smbpasswd file. 
                </para></listitem>
                </varlistentry>
        </variablelist>
</refsect1>


<refsect1>
        <title>NOTES</title>
        
        <para>Since <command>smbpasswd</command> works in client-server 
        mode communicating  with a local smbd for a non-root user then 
        the smbd daemon must be running for this to work. A common problem 
        is to add a restriction to the hosts that may access the <command>
        smbd</command> running on the local machine by specifying either <parameter>allow
        hosts</parameter> or <parameter>deny hosts</parameter> entry in 
        the <citerefentry><refentrytitle>smb.conf</refentrytitle>
        <manvolnum>5</manvolnum></citerefentry> file and neglecting to 
        allow "localhost" access to the smbd. </para>

        <para>In addition, the smbpasswd command is only useful if Samba
        has been set up to use encrypted passwords. </para>
</refsect1>


<refsect1>
        <title>VERSION</title>

        <para>This man page is part of version &doc.version; of the Samba suite.</para>
</refsect1>

<refsect1>
        <title>SEE ALSO</title>
        <para><citerefentry><refentrytitle>smbpasswd</refentrytitle>
        <manvolnum>5</manvolnum></citerefentry>, <citerefentry><refentrytitle>Samba</refentrytitle>
        <manvolnum>7</manvolnum></citerefentry>.</para>
</refsect1>

<refsect1>
        <title>AUTHOR</title>
        
        <para>The original Samba software and related utilities 
        were created by Andrew Tridgell. Samba is now developed
        by the Samba Team as an Open Source project similar 
        to the way the Linux kernel is developed.</para>
</refsect1>

</refentry>