[svn-upgrade] Integrating new upstream version, shadow (4.0.9)
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nekral-guest
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man/pwck.8.xml
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159
man/pwck.8.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
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"http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd">
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<refentry id='pwck.8'>
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<!-- $Id: pwck.8.xml,v 1.6 2005/04/27 18:20:35 kloczek Exp $ -->
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<refmeta>
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<refentrytitle>pwck</refentrytitle>
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<manvolnum>8</manvolnum>
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</refmeta>
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<refnamediv id='name'>
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<refname>pwck</refname>
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<refpurpose>verify integrity of password files</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>pwck</command> <arg choice='opt'>-sr </arg>
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<arg choice='opt'>
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<arg choice='plain'>
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<replaceable>passwd</replaceable>
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</arg>
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<arg choice='plain'>
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<replaceable>shadow</replaceable>
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</arg>
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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>pwck</command> verifies the integrity of the system
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authentication information. All entries in the
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<filename>/etc/passwd</filename> and <filename>/etc/shadow</filename>
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are checked to see that the entry has the proper format and valid data
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in each field. The user is prompted to delete entries that are
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improperly formatted or which have other uncorrectable errors.
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</para>
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<para>Checks are made to verify that each entry has</para>
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<!-- .in +.5i -->
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<para>- the correct number of fields
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<!-- .br -->
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- a unique user name
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<!-- .br -->
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- a valid user and group identifier
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<!-- .br -->
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- a valid primary group
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<!-- .br -->
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- a valid home directory
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<!-- .br -->
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- a valid login shell
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</para>
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<!-- .in \-.5i -->
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<para>The checks for correct number of fields and unique user name are
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fatal. If the entry has the wrong number of fields, the user will be
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prompted to delete the entire line. If the user does not answer
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affirmatively, all further checks are bypassed. An entry with a
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duplicated user name is prompted for deletion, but the remaining
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checks will still be made. All other errors are warning and the user
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is encouraged to run the <command>usermod</coamand> command to correct
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the error.
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</para>
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<para> The commands which operate on the
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<filename>/etc/passwd</filename> file are not able to alter corrupted
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or duplicated entries. <command>pwck</command> should be used in
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those circumstances to remove the offending entry.
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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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By default, <command>pwck</command> operates on the files
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<filename>/etc/passwd</filename> and <filename>/etc/shadow</filename>.
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The user may select alternate files with the <emphasis
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remap='I'>passwd</emphasis> and <emphasis remap='I'>shadow</emphasis>
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parameters. Additionally, the user may execute the command in
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read-only mode by specifying the <option>-r</option> flag. This causes
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all questions regarding changes to be answered <emphasis
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remap='B'>no</emphasis> without user intervention.
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<command>pwck</command> can also sort entries in
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<filename>/etc/passwd</filename> and <filename>/etc/shadow</filename>
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by UID. To run it in sort mode pass it <option>-s</option> flag. No
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checks are performed then, it just sorts.
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</para>
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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>/etc/group</filename></term>
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<listitem>group account information</listitem>
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</varlistentry>
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<varlistentry>
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<term><filename>/etc/passwd</filename></term>
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<listitem>user account information</listitem>
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</varlistentry>
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<varlistentry>
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<term><filename>/etc/shadow</filename></term>
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<listitem>secure user account information</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1 id='see_also'>
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<title>SEE ALSO</title>
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<para>
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<citerefentry>
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<refentrytitle>group</refentrytitle><manvolnum>5</manvolnum>
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</citerefentry>,
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<citerefentry>
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<refentrytitle>passwd</refentrytitle><manvolnum>5</manvolnum>
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</citerefentry>,
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<citerefentry>
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<refentrytitle>shadow</refentrytitle><manvolnum>5</manvolnum>
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</citerefentry>,
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<citerefentry>
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<refentrytitle>usermod</refentrytitle><manvolnum>8</manvolnum>
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</citerefentry>
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</para>
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</refsect1>
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<refsect1 id='exit_values'>
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<title>EXIT VALUES</title>
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<variablelist remap='TP'>
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<varlistentry>
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<term>
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The <command>pwck</command> command exits with the
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following values:
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</term>
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<listitem>
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<para>
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<literal>0</literal> - success
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<!-- .br -->
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<literal>1</literal> - invalid command syntax
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<!-- .br -->
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<literal>2</literal> - one or more bad password entries
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<!-- .br -->
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<literal>3</literal> - can't open password files
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<!-- .br -->
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<literal>4</literal> - can't lock password files
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<!-- .br -->
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<literal>5</literal> - can't update password files
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</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='author'>
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<title>AUTHOR</title>
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<para>Julianne Frances Haugh (jockgrrl@ix.netcom.com)</para>
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</refsect1>
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</refentry>
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