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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>第 24 章 FAQ</title><link rel="stylesheet" type="text/css" href="/docbook.css" /><meta name="generator" content="DocBook XSL Stylesheets V1.79.1" /><meta name="keywords" content=" 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<a xmlns="" href="mailto:netkiller@msn.com">Email</a><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">第 24 章 FAQ</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ports.devel.html">上一页</a> </td><th width="60%" align="center"> </th><td width="20%" align="right"> <a accesskey="n" href="su.sorry.html">下一页</a></td></tr></table><hr /></div><table xmlns=""><tr><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&repo=netkiller.github.io&type=watch&count=true&size=large" height="30" width="170" frameborder="0" scrolling="0" style="width:170px; height: 30px;" allowTransparency="true"></iframe></td><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&repo=netkiller.github.io&type=fork&count=true&size=large" height="30" width="170" frameborder="0" scrolling="0" style="width:170px; height: 30px;" allowTransparency="true"></iframe></td><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&type=follow&count=true&size=large" height="30" width="240" frameborder="0" scrolling="0" style="width:240px; height: 30px;" allowTransparency="true"></iframe></td></tr></table><div class="chapter"><div class="titlepage"><div><div><h1 class="title"><a id="faq"></a>第 24 章 FAQ</h1></div></div></div><div class="toc"><p><strong>目录</strong></p><dl class="toc"><dt><span class="section"><a href="faq.html#faq.limit">24.1. Linux用户使用FreeBSD，问FreeBSD ulimit怎么设置？</a></span></dt><dt><span class="section"><a href="su.sorry.html">24.2. su: Sorry</a></span></dt></dl></div>
<div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="faq.limit"></a>24.1. Linux用户使用FreeBSD，问FreeBSD ulimit怎么设置？</h2></div></div></div>
<p>首先说明FreeBSD默认Shell是csh没有ulimit命令，但C Shell有limit命令。如果你想使用ulimit命令可以安装Bourne shell，Bash，Zsh</p>
<p>limit,ulimit比较</p>
<pre class="screen">
[neo@freebsd:~] limit
cputime unlimited
filesize unlimited
datasize 32768MB
stacksize 512MB
coredumpsize unlimited
memoryuse unlimited
memorylocked unlimited
maxproc 5547
descriptors 65536
sockbufsize unlimited
vmemorysize unlimited
NPTS unlimited
SWAP unlimited
[neo@freebsd:~] env | grep SHELL
SHELL=/usr/local/bin/zsh
[neo@freebsd:~] ulimit -a
-t: cpu time (seconds) unlimited
-f: file size (blocks) unlimited
-d: data seg size (kbytes) 33554432
-s: stack size (kbytes) 524288
-c: core file size (blocks) unlimited
-m: resident set size (kbytes) unlimited
-l: locked-in-memory size (kb) unlimited
-u: processes 5547
-n: file descriptors 65536
-N 9: socket buffer size (kb) unlimited
-v: virtual memory size (kb) unlimited
-N 11: unlimited
-N 12: unlimited
在Freebsd上，你能使用sysctl命令：
</pre>
<p>以 nofile - max number of open files 为例，limit、ulimit、sysctl实现同样的功能。</p>
<pre class="screen">
csh% limit descriptors unlimited
或者
csh% limit descriptors 4096
sh$ ulimit -n unlimited
或者
sh$ ulimit -n 4096
sysctl kern.maxfiles=65536
sysctl kern.maxfilesperproc=65536
</pre>
<p>写入配置文件 sysctl.conf</p>
<pre class="screen">
[neo@freebsd:~] cat /etc/sysctl.conf
# $FreeBSD: src/etc/sysctl.conf,v 1.8.34.1.4.1 2010/06/14 02:09:06 kensmith Exp $
#
# This file is read when going to multi-user and its contents piped thru
# ``sysctl'' to adjust kernel values. ``man 5 sysctl.conf'' for details.
#
# Uncomment this to prevent users from seeing information about processes that
# are being run under another UID.
#security.bsd.see_other_uids=0
#vm.pmap.shpgperproc: 2000
#vm.pmap.pv_entry_max: 13338058
kern.ipc.shm_use_phys=1
kern.maxfiles=65536
kern.maxfilesperproc=65536
kern.ipc.somaxconn=2048
[neo@freebsd:~] /etc/rc.d/sysctl reload
[neo@freebsd:~] sysctl -a | grep maxfiles
kern.maxfiles: 65536
kern.maxfilesperproc: 65536
</pre>
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