shadow/man/faillog.8.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<refentry id='faillog.8'>
<!-- $Id$ -->
<refmeta>
<refentrytitle>faillog</refentrytitle>
<manvolnum>8</manvolnum>
<refmiscinfo class="sectdesc">System Management Commands</refmiscinfo>
</refmeta>
<refnamediv id='name'>
<refname>faillog</refname>
<refpurpose>display faillog records or set login failure limits</refpurpose>
</refnamediv>
<refsynopsisdiv id='synopsis'>
<cmdsynopsis>
<command>faillog</command>
<arg choice='opt'>
<replaceable>options</replaceable>
</arg>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1 id='description'>
<title>DESCRIPTION</title>
<para>
<command>faillog</command> formats the contents of the failure log
from <filename>/var/log/faillog</filename> database. It also can be
used for maintains failure counters and limits. Run
<command>faillog</command> without arguments display only list of user
faillog records who have ever had a login failure.
</para>
</refsect1>
<refsect1 id='options'>
<title>OPTIONS</title>
<para>
The options which apply to the <command>faillog</command> command
are:
</para>
<variablelist remap='IP'>
<varlistentry>
<term><option>-a</option>, <option>--all</option></term>
<listitem>
<para>Display faillog records for all users.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-h</option>, <option>--help</option></term>
<listitem>
<para>Display help message and exit.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<option>-l</option>, <option>--lock-time</option>
<replaceable>SEC</replaceable>
</term>
<listitem>
<para>
Lock account to <replaceable>SEC</replaceable>
seconds after failed login.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<option>-m</option>, <option>--maximum</option>
<replaceable>MAX</replaceable>
</term>
<listitem>
<para>
Set maximum number of login failures after the account is
disabled to <replaceable>MAX</replaceable>. Selecting
<replaceable>MAX</replaceable> value of 0 has the effect of not
placing a limit on the number of failed logins. The maximum
failure count should always be 0 for <emphasis>root</emphasis>
to prevent a denial of services attack against the system.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-r</option>, <option>--reset</option></term>
<listitem>
<para>
Reset the counters of login failures or one record if used with
the <option>-u</option> <replaceable>LOGIN</replaceable>
option. Write access to <filename>/var/log/faillog</filename>
is required for this option.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-t</option>, <option>--time</option>
<replaceable>DAYS</replaceable>
</term>
<listitem>
<para>
Display faillog records more recent than
<replaceable>DAYS</replaceable>. The <option>-t</option>
flag overrides the use of <option>-u</option>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<option>-u</option>, <option>--user</option> <replaceable>LOGIN</replaceable>
</term>
<listitem>
<para>
Display faillog record or maintains failure counters and limits
(if used with <option>-l</option>, <option>-m</option> or
<option>-r</option> options) only for user with
<replaceable>LOGIN</replaceable>.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 id='caveats'>
<title>CAVEATS</title>
<para>
<command>faillog</command> only prints out users with no successful
login since the last failure. To print out a user who has had a
successful login since their last failure, you must explicitly request
the user with the <option>-u</option> flag, or print out all users
with the <option>-a</option> flag.
</para>
</refsect1>
<refsect1 id='files'>
<title>FILES</title>
<variablelist>
<varlistentry>
<term><filename>/var/log/faillog</filename></term>
<listitem>
<para>Failure logging file.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 id='see_also'>
<title>SEE ALSO</title>
<para>
<citerefentry>
<refentrytitle>login</refentrytitle><manvolnum>1</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>faillog</refentrytitle><manvolnum>5</manvolnum>
</citerefentry>.
</para>
</refsect1>
</refentry>