6448da507e
- Add tips in error message. - Add tips in man. - Add zh_CN and zh_TW for tips. Signed-off-by: Celeste Liu <coelacanthus@outlook.com>
222 lines
7.0 KiB
XML
222 lines
7.0 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!--
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SPDX-FileCopyrightText: 1992 , Julianne Frances Haugh
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SPDX-FileCopyrightText: 1992 , Phillip Street
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SPDX-FileCopyrightText: 2007 - 2011, Nicolas François
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SPDX-License-Identifier: BSD-3-Clause
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-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY LASTLOG_UID_MAX SYSTEM "login.defs.d/LASTLOG_UID_MAX.xml">
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<!-- SHADOW-CONFIG-HERE -->
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]>
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<refentry id='lastlog.8'>
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<!-- $Id$ -->
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<refentryinfo>
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<author>
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<firstname>Julianne Frances</firstname>
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<surname>Haugh</surname>
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<contrib>Creation, 1992</contrib>
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</author>
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<author>
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<firstname>Thomas</firstname>
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<surname>Kłoczko</surname>
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<email>kloczek@pld.org.pl</email>
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<contrib>shadow-utils maintainer, 2000 - 2007</contrib>
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</author>
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<author>
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<firstname>Nicolas</firstname>
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<surname>François</surname>
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<email>nicolas.francois@centraliens.net</email>
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<contrib>shadow-utils maintainer, 2007 - now</contrib>
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</author>
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</refentryinfo>
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<refmeta>
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<refentrytitle>lastlog</refentrytitle>
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<manvolnum>8</manvolnum>
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<refmiscinfo class="sectdesc">System Management Commands</refmiscinfo>
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<refmiscinfo class="source">shadow-utils</refmiscinfo>
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<refmiscinfo class="version">&SHADOW_UTILS_VERSION;</refmiscinfo>
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</refmeta>
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<refnamediv id='name'>
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<refname>lastlog</refname>
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<refpurpose>reports the most recent login of all users or of a given user</refpurpose>
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</refnamediv>
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<!-- body begins here -->
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<refsynopsisdiv id='synopsis'>
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<cmdsynopsis>
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<command>lastlog</command>
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<arg choice='opt'>
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<replaceable>options</replaceable>
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</arg>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1 id='description'>
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<title>DESCRIPTION</title>
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<para>
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<command>lastlog</command> formats and prints the contents of the last
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login log <filename>/var/log/lastlog</filename> file. The
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<emphasis>login-name</emphasis>, <emphasis>port</emphasis>, and
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<emphasis>last login time</emphasis> will be printed. The default (no
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flags) causes lastlog entries to be printed, sorted by their order in
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<filename>/etc/passwd</filename>.
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</para>
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</refsect1>
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<refsect1 id='options'>
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<title>OPTIONS</title>
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<para>
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The options which apply to the <command>lastlog</command> command are:
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</para>
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<variablelist remap='IP'>
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<varlistentry>
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<term>
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<option>-b</option>, <option>--before</option> <replaceable>DAYS</replaceable>
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</term>
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<listitem>
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<para>
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Print only lastlog records older than <replaceable>DAYS</replaceable>.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>-C</option>, <option>--clear</option>
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</term>
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<listitem>
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<para>
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Clear lastlog record of a user. This option can be used only together
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with <option>-u</option> (<option>--user</option>)).
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>-h</option>, <option>--help</option>
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</term>
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<listitem>
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<para>Display help message and exit.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>-R</option>, <option>--root</option> <replaceable>CHROOT_DIR</replaceable>
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</term>
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<listitem>
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<para>
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Apply changes in the <replaceable>CHROOT_DIR</replaceable>
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directory and use the configuration files from the
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<replaceable>CHROOT_DIR</replaceable> directory.
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Only absolute paths are supported.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>-S</option>, <option>--set</option>
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</term>
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<listitem>
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<para>
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Set lastlog record of a user to the current time. This option can be
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used only together with <option>-u</option> (<option>--user</option>)).
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>-t</option>, <option>--time</option> <replaceable>DAYS</replaceable>
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</term>
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<listitem>
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<para>
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Print the lastlog records more recent than
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<replaceable>DAYS</replaceable>.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>-u</option>, <option>--user</option> <replaceable>LOGIN</replaceable>|<replaceable>RANGE</replaceable>
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</term>
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<listitem>
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<para>
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Print the lastlog record of the specified user(s).
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</para>
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<para>
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The users can be specified by a login name, a numerical user ID,
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or a <replaceable>RANGE</replaceable> of users. This
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<replaceable>RANGE</replaceable> of users can be specified with a
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min and max values (<replaceable>UID_MIN-UID_MAX</replaceable>), a
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max value (<replaceable>-UID_MAX</replaceable>), or a min value
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(<replaceable>UID_MIN-</replaceable>).
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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<para>
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If the user has never logged in the message <emphasis>** Never logged
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in**</emphasis> will be displayed instead of the port and time.
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</para>
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<para>
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Only the entries for the current users of the system will be
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displayed. Other entries may exist for users that were deleted
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previously.
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</para>
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</refsect1>
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<refsect1 id='note'>
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<title>NOTE</title>
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<para>
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The <filename>lastlog</filename> file is a database which contains info
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on the last login of each user. You should not rotate it. It is a sparse
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file, so its size on the disk is usually much smaller than the one shown
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by "<command>ls -l</command>" (which can indicate a really big file if
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you have in <filename>passwd</filename> users with a high UID). You can
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display its real size with "<command>ls -s</command>".
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</para>
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</refsect1>
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<refsect1 id='configuration'>
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<title>CONFIGURATION</title>
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<para>
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The following configuration variables in
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<filename>/etc/login.defs</filename> change the behavior of this
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tool:
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</para>
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<variablelist>
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&LASTLOG_UID_MAX;
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</variablelist>
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</refsect1>
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<refsect1 id='files'>
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<title>FILES</title>
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<variablelist>
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<varlistentry>
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<term><filename>/var/log/lastlog</filename></term>
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<listitem>
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<para>Database times of previous user logins.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1 id='caveats'>
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<title>CAVEATS</title>
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<para>
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Large gaps in UID numbers will cause the lastlog program to run
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longer with no output to the screen (i.e. if in lastlog database there
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is no entries for users with UID between 170 and 800 lastlog will appear
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to hang as it processes entries with UIDs 171-799).
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</para>
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<para>
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Having high UIDs can create problems when handling the <term><filename>
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/var/log/lastlog</filename></term> with external tools. Although the
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actual file is sparse and does not use too much space, certain
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applications are not designed to identify sparse files by default and may
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require a specific option to handle them.
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</para>
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</refsect1>
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</refentry>
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