shadow/man/lastlog.8.xml
Tomas Mraz 66897b6f6d Add ability to clear or set lastlog record for user via lastlog command
This functionality is useful because there is now a feature
of Linux-PAM's pam_lastlog module to block expired users (users
which did not login recently enough) from login. This commit
complements it so the sysadmin is able to unblock such expired user.

Signed-off-by: Tomáš Mráz <tmraz@fedoraproject.org>
2016-03-03 15:37:01 +01:00

225 lines
7.7 KiB
XML

<?xml version="1.0" encoding="UTF-8"?>
<!--
Copyright (c) 1992 , Julianne Frances Haugh
Copyright (c) 1992 , Phillip Street
Copyright (c) 2007 - 2011, Nicolas François
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook V4.5//EN"
"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
<!-- SHADOW-CONFIG-HERE -->
]>
<refentry id='lastlog.8'>
<!-- $Id$ -->
<refentryinfo>
<author>
<firstname>Julianne Frances</firstname>
<surname>Haugh</surname>
<contrib>Creation, 1992</contrib>
</author>
<author>
<firstname>Thomas</firstname>
<surname>Kłoczko</surname>
<email>kloczek@pld.org.pl</email>
<contrib>shadow-utils maintainer, 2000 - 2007</contrib>
</author>
<author>
<firstname>Nicolas</firstname>
<surname>François</surname>
<email>nicolas.francois@centraliens.net</email>
<contrib>shadow-utils maintainer, 2007 - now</contrib>
</author>
</refentryinfo>
<refmeta>
<refentrytitle>lastlog</refentrytitle>
<manvolnum>8</manvolnum>
<refmiscinfo class="sectdesc">System Management Commands</refmiscinfo>
<refmiscinfo class="source">shadow-utils</refmiscinfo>
<refmiscinfo class="version">&SHADOW_UTILS_VERSION;</refmiscinfo>
</refmeta>
<refnamediv id='name'>
<refname>lastlog</refname>
<refpurpose>reports the most recent login of all users or of a given user</refpurpose>
</refnamediv>
<!-- body begins here -->
<refsynopsisdiv id='synopsis'>
<cmdsynopsis>
<command>lastlog</command>
<arg choice='opt'>
<replaceable>options</replaceable>
</arg>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1 id='description'>
<title>DESCRIPTION</title>
<para>
<command>lastlog</command> formats and prints the contents of the last
login log <filename>/var/log/lastlog</filename> file. The
<emphasis>login-name</emphasis>, <emphasis>port</emphasis>, and
<emphasis>last login time</emphasis> will be printed. The default (no
flags) causes lastlog entries to be printed, sorted by their order in
<filename>/etc/passwd</filename>.
</para>
</refsect1>
<refsect1 id='options'>
<title>OPTIONS</title>
<para>
The options which apply to the <command>lastlog</command> command are:
</para>
<variablelist remap='IP'>
<varlistentry>
<term>
<option>-b</option>, <option>--before</option>&nbsp;<replaceable>DAYS</replaceable>
</term>
<listitem>
<para>
Print only lastlog records older than <emphasis remap='I'>DAYS</emphasis>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<option>-C</option>, <option>--clear</option>
</term>
<listitem>
<para>
Clear lastlog record of an user. This option can be used only together
with <option>-u</option> (<option>--user</option>)).
</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>-R</option>, <option>--root</option>&nbsp;<replaceable>CHROOT_DIR</replaceable>
</term>
<listitem>
<para>
Apply changes in the <replaceable>CHROOT_DIR</replaceable>
directory and use the configuration files from the
<replaceable>CHROOT_DIR</replaceable> directory.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<option>-S</option>, <option>--set</option>
</term>
<listitem>
<para>
Set lastlog record of an user to the current time. This option can be
used only together with <option>-u</option> (<option>--user</option>)).
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<option>-t</option>, <option>--time</option>&nbsp;<replaceable>DAYS</replaceable>
</term>
<listitem>
<para>
Print the lastlog records more recent than
<emphasis remap='I'>DAYS</emphasis>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<option>-u</option>, <option>--user</option>&nbsp;<replaceable>LOGIN</replaceable>|<replaceable>RANGE</replaceable>
</term>
<listitem>
<para>
Print the lastlog record of the specified user(s).
</para>
<para>
The users can be specified by a login name, a numerical user ID,
or a <replaceable>RANGE</replaceable> of users. This
<replaceable>RANGE</replaceable> of users can be specified with a
min and max values (<replaceable>UID_MIN-UID_MAX</replaceable>), a
max value (<replaceable>-UID_MAX</replaceable>), or a min value
(<replaceable>UID_MIN-</replaceable>).
</para>
</listitem>
</varlistentry>
</variablelist>
<para>
If the user has never logged in the message <emphasis>** Never logged
in**</emphasis> will be displayed instead of the port and time.
</para>
<para>
Only the entries for the current users of the system will be
displayed. Other entries may exist for users that were deleted
previously.
</para>
</refsect1>
<refsect1 id='note'>
<title>NOTE</title>
<para>
The <filename>lastlog</filename> file is a database which contains info
on the last login of each user. You should not rotate it. It is a sparse
file, so its size on the disk is usually much smaller than the one shown
by "<command>ls -l</command>" (which can indicate a really big file if
you have in <filename>passwd</filename> users with a high UID). You can
display its real size with "<command>ls -s</command>".
</para>
</refsect1>
<refsect1 id='files'>
<title>FILES</title>
<variablelist>
<varlistentry>
<term><filename>/var/log/lastlog</filename></term>
<listitem>
<para>Database times of previous user logins.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 id='caveats'>
<title>CAVEATS</title>
<para>
Large gaps in UID numbers will cause the lastlog program to run
longer with no output to the screen (i.e. if in lastlog database there
is no entries for users with UID between 170 and 800 lastlog will appear
to hang as it processes entries with UIDs 171-799).
</para>
</refsect1>
</refentry>