131 lines
4.4 KiB
XML
131 lines
4.4 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
|
|
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
|
|
"http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd">
|
|
<refentry id='limits.5'>
|
|
<!-- $Id: limits.5.xml,v 1.18 2006/02/07 04:03:45 kloczek Exp $ -->
|
|
<refmeta>
|
|
<refentrytitle>limits</refentrytitle>
|
|
<manvolnum>5</manvolnum>
|
|
<refmiscinfo class="sectdesc">File Formats and Conversions</refmiscinfo>
|
|
</refmeta>
|
|
<refnamediv id='name'>
|
|
<refname>limits</refname>
|
|
<refpurpose>Resource limits definition</refpurpose>
|
|
</refnamediv>
|
|
<!-- body begins here -->
|
|
|
|
<refsect1 id='description'>
|
|
<title>DESCRIPTION</title>
|
|
<para>
|
|
The <emphasis remap='I'>limits</emphasis> file (/etc/limits by default
|
|
or LIMITS_FILE defined config.h) describes the resource limits you
|
|
wish to impose. It should be owned by root and readable by root
|
|
account only.
|
|
</para>
|
|
|
|
<para>
|
|
By default no quota is imposed on 'root'. In fact, there is no way to
|
|
impose limits via this procedure to root-equiv accounts (accounts with
|
|
UID 0).
|
|
</para>
|
|
|
|
<para>Each line describes a limit for a user in the form:</para>
|
|
|
|
<para>
|
|
<emphasis remap='I'>user LIMITS_STRING</emphasis>
|
|
</para>
|
|
|
|
<para>
|
|
The <emphasis>LIMITS_STRING</emphasis> is a string of a
|
|
concatenated list of resource limits.
|
|
Each limit consists of a letter identifier followed by a numerical
|
|
limit.
|
|
</para>
|
|
|
|
<para>The valid identifiers are:</para>
|
|
|
|
<itemizedlist>
|
|
<listitem><para>A: max address space (KB)</para></listitem>
|
|
<listitem><para>C: max core file size (KB)</para></listitem>
|
|
<listitem><para>D: max data size (KB)</para></listitem>
|
|
<listitem><para>F: maximum filesize (KB)</para></listitem>
|
|
<listitem><para>M: max locked-in-memory address space (KB)</para></listitem>
|
|
<listitem><para>N: max number of open files</para></listitem>
|
|
<listitem><para>R: max resident set size (KB)</para></listitem>
|
|
<listitem><para>S: max stack size (KB)</para></listitem>
|
|
<listitem><para>T: max CPU time (MIN)</para></listitem>
|
|
<listitem><para>U: max number of processes</para></listitem>
|
|
<listitem><para>K: file creation mask, set by
|
|
<citerefentry>
|
|
<refentrytitle>umask</refentrytitle><manvolnum>2</manvolnum>
|
|
</citerefentry>.</para>
|
|
</listitem>
|
|
<listitem><para>L: max number of logins for this user</para></listitem>
|
|
<listitem><para>P: process priority, set by
|
|
<citerefentry>
|
|
<refentrytitle>setpriority</refentrytitle><manvolnum>2</manvolnum>
|
|
</citerefentry>.</para>
|
|
</listitem>
|
|
</itemizedlist>
|
|
|
|
<para>
|
|
For example, <emphasis remap='I'>L2D2048N5</emphasis> is a valid
|
|
<emphasis>LIMITS_STRING </emphasis>. For reading convenience, the
|
|
following entries are equivalent:
|
|
</para>
|
|
|
|
<programlisting>
|
|
username L2D2048N5
|
|
username L2 D2048 N5
|
|
</programlisting>
|
|
|
|
<para>
|
|
Be aware that after <emphasis remap='I'>username</emphasis> the rest
|
|
of the line is considered a limit string, thus comments are not
|
|
allowed. A invalid limits string will be rejected (not considered) by
|
|
the login program.
|
|
</para>
|
|
|
|
<para>
|
|
The default entry is denoted by username "<emphasis>*</emphasis>". If
|
|
you have multiple <emphasis remap='I'>default</emphasis> entries in
|
|
your <emphasis>LIMITS_FILE</emphasis>, then the last one will be used
|
|
as the default entry.
|
|
</para>
|
|
|
|
<para>
|
|
To completely disable limits for a user, a single dash
|
|
"<emphasis>-</emphasis> "will do. </para>
|
|
<para>
|
|
Also, please note that all limit settings are set PER LOGIN. They are
|
|
not global, nor are they permanent. Perhaps global limits will come,
|
|
but for now this will have to do ;)
|
|
</para>
|
|
</refsect1>
|
|
|
|
<refsect1 id='files'>
|
|
<title>FILES</title>
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><filename>/etc/limits</filename></term>
|
|
<listitem><para></para></listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect1>
|
|
|
|
<refsect1 id='see_also'>
|
|
<title>SEE ALSO</title>
|
|
<para>
|
|
<citerefentry>
|
|
<refentrytitle>login</refentrytitle><manvolnum>1</manvolnum>
|
|
</citerefentry>,
|
|
<citerefentry>
|
|
<refentrytitle>setpriority</refentrytitle><manvolnum>2</manvolnum>
|
|
</citerefentry>,
|
|
<citerefentry>
|
|
<refentrytitle>setrlimit</refentrytitle><manvolnum>2</manvolnum>
|
|
</citerefentry>.
|
|
</para>
|
|
</refsect1>
|
|
</refentry>
|