shadow/man/subuid.5.xml

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<?xml version="1.0" encoding="UTF-8"?>
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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='subuid.5'>
<refmeta>
<refentrytitle>subuid</refentrytitle>
<manvolnum>5</manvolnum>
<refmiscinfo class="sectdesc">File Formats and Conversions</refmiscinfo>
<refmiscinfo class="source">shadow-utils</refmiscinfo>
<refmiscinfo class="version">&SHADOW_UTILS_VERSION;</refmiscinfo>
</refmeta>
<refnamediv id='name'>
<refname>subuid</refname>
<refpurpose>the subordinate uid file</refpurpose>
</refnamediv>
<refsect1 id='description'>
<title>DESCRIPTION</title>
<para>
Each line in <filename>/etc/subuid</filename> contains
a user id and a range of suboridinate user ids that user
is allowed to use.
This is specified with three fields delimited by colons
(<quote>:</quote>).
These fields are:
</para>
<itemizedlist mark='bullet'>
<listitem>
<para>login name</para>
</listitem>
<listitem>
<para>numerical subordinate user ID</para>
</listitem>
<listitem>
<para>numerical subordinate user ID count</para>
</listitem>
</itemizedlist>
<para>
This file specifies the user IDs to be that each user may use
with the <command>newuidmap</command> command that ordinary users can use to
configure uid mapping in a user namespace.
</para>
<para>
Multiple ranges may be specified per user ID.
</para>
</refsect1>
<refsect1 id='files'>
<title>FILES</title>
<variablelist>
<varlistentry>
<term><filename>/etc/subuid</filename></term>
<listitem>
<para>Per user subordinate user IDs.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><filename>/etc/subuid-</filename></term>
<listitem>
<para>Backup file for /etc/subuid.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 id='see_also'>
<title>SEE ALSO</title>
<para>
<citerefentry>
<refentrytitle>subgid</refentrytitle><manvolnum>5</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>logindefs</refentrytitle><manvolnum>5</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>newuidmap</refentrytitle><manvolnum>1</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>newgidmap</refentrytitle><manvolnum>1</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>usermod</refentrytitle><manvolnum>8</manvolnum>
</citerefentry>,
</para>
</refsect1>
</refentry>