224 lines
4.5 KiB
HTML
224 lines
4.5 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML><HEAD><TITLE>Man page of FAILLOG</TITLE>
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</HEAD><BODY>
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<H1>FAILLOG</H1>
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Section: System Management Commands (8)<BR>Updated: 05/28/2020<BR><A HREF="#index">Index</A>
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<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
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<A NAME="lbAB"> </A>
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<H2>NAME</H2>
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faillog - display faillog records or set login failure limits
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<DL COMPACT>
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<DT id="1">
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<B>faillog</B> [<I>options</I>]
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</DL>
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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<P>
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<B>faillog</B>
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<DD>displays the contents of the failure log database (/var/log/faillog). It can also set the failure counters and limits. When
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<B>faillog</B>
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is run without arguments, it only displays the faillog records of the users who had a login failure.
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<A NAME="lbAE"> </A>
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<H2>OPTIONS</H2>
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<P>
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The options which apply to the
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<B>faillog</B>
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command are:
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<P>
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<B>-a</B>, <B>--all</B>
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<DL COMPACT><DT id="2"><DD>
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Display (or act on) faillog records for all users having an entry in the
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faillog
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database.
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<P>
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The range of users can be restricted with the
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<B>-u</B>
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option.
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<P>
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In display mode, this is still restricted to existing users but forces the display of the faillog entries even if they are empty.
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<P>
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With the
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<B>-l</B>,
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<B>-m</B>,
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<B>-r</B>,
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<B>-t</B>
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options, the users' records are changed, even if the user does not exist on the system. This is useful to reset records of users that have been deleted or to set a policy in advance for a range of users.
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</DL>
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<P>
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<B>-h</B>, <B>--help</B>
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<DL COMPACT><DT id="3"><DD>
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Display help message and exit.
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</DL>
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<P>
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<B>-l</B>, <B>--lock-secs</B> <I>SEC</I>
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<DL COMPACT><DT id="4"><DD>
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Lock account for
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<I>SEC</I>
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seconds after failed login.
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<P>
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Write access to
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/var/log/faillog
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is required for this option.
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</DL>
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<P>
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<B>-m</B>, <B>--maximum</B> <I>MAX</I>
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<DL COMPACT><DT id="5"><DD>
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Set the maximum number of login failures after the account is disabled to
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<I>MAX</I>.
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<P>
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Selecting a
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<I>MAX</I>
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value of 0 has the effect of not placing a limit on the number of failed logins.
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<P>
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The maximum failure count should always be 0 for
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<I>root</I>
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to prevent a denial of services attack against the system.
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<P>
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Write access to
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/var/log/faillog
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is required for this option.
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</DL>
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<P>
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<B>-r</B>, <B>--reset</B>
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<DL COMPACT><DT id="6"><DD>
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Reset the counters of login failures.
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<P>
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Write access to
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/var/log/faillog
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is required for this option.
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</DL>
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<P>
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<B>-R</B>, <B>--root</B> <I>CHROOT_DIR</I>
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<DL COMPACT><DT id="7"><DD>
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Apply changes in the
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<I>CHROOT_DIR</I>
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directory and use the configuration files from the
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<I>CHROOT_DIR</I>
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directory.
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</DL>
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<P>
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<B>-t</B>, <B>--time</B> <I>DAYS</I>
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<DL COMPACT><DT id="8"><DD>
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Display faillog records more recent than
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<I>DAYS</I>.
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</DL>
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<P>
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<B>-u</B>, <B>--user</B> <I>LOGIN</I>|<I>RANGE</I>
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<DL COMPACT><DT id="9"><DD>
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Display faillog record or maintains failure counters and limits (if used with
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<B>-l</B>,
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<B>-m</B>
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or
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<B>-r</B>
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options) only for the specified user(s).
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<P>
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The users can be specified by a login name, a numerical user ID, or a
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<I>RANGE</I>
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of users. This
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<I>RANGE</I>
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of users can be specified with a min and max values (<I>UID_MIN-UID_MAX</I>), a max value (<I>-UID_MAX</I>), or a min value (<I>UID_MIN-</I>).
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</DL>
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<P>
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When none of the
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<B>-l</B>,
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<B>-m</B>, or
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<B>-r</B>
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options are used,
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<B>faillog</B>
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displays the faillog record of the specified user(s).
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<A NAME="lbAF"> </A>
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<H2>CAVEATS</H2>
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<P>
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<B>faillog</B>
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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
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<B>-u</B>
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flag, or print out all users with the
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<B>-a</B>
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flag.
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<A NAME="lbAG"> </A>
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<H2>FILES</H2>
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<P>
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/var/log/faillog
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<DL COMPACT><DT id="10"><DD>
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Failure logging file.
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</DL>
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<A NAME="lbAH"> </A>
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<H2>SEE ALSO</H2>
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<P>
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<B><A HREF="/cgi-bin/man/man2html?1+login">login</A></B>(1),
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<B><A HREF="/cgi-bin/man/man2html?5+faillog">faillog</A></B>(5).
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<P>
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<HR>
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<A NAME="index"> </A><H2>Index</H2>
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<DL>
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<DT id="11"><A HREF="#lbAB">NAME</A><DD>
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<DT id="12"><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT id="13"><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT id="14"><A HREF="#lbAE">OPTIONS</A><DD>
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<DT id="15"><A HREF="#lbAF">CAVEATS</A><DD>
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<DT id="16"><A HREF="#lbAG">FILES</A><DD>
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<DT id="17"><A HREF="#lbAH">SEE ALSO</A><DD>
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</DL>
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<HR>
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This document was created by
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<A HREF="/cgi-bin/man/man2html">man2html</A>,
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using the manual pages.<BR>
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Time: 00:06:12 GMT, March 31, 2021
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</BODY>
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</HTML>
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