shadow/man/lastlog.8.xml

<?xml version="1.0" encoding="UTF-8"?>
<refentry id='lastlog.8'>
  <!-- $Id$ -->
  <refmeta>
    <refentrytitle>lastlog</refentrytitle>
    <manvolnum>8</manvolnum>
    <refmiscinfo class="sectdesc">System Management Commands</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> <replaceable>DAYS</replaceable>
	</term>
	<listitem>
	  <para>
	    Print only lastlog records older than <emphasis remap='I'>DAYS</emphasis>.
	  </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>-t</option>, <option>--time</option>
	  <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>
	  <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>
  </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>