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.\" Copyright 1991, Julianne Frances Haugh
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.\" All rights reserved.
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.\"; 中文版版权所有 soloman, Laser www.linuxforum.net 2000
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of Julianne F. Haugh nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $Id: chpasswd.8,v 1.4 2005/12/01 20:38:28 kloczek Exp $
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.\"
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.TH CHPASSWD 8
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.SH NAME 名字
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chpasswd \- 成批更新用户的口令
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.SH 总览
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chpasswd [\-e]
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.SH 描述
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.B chpasswd
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从系统的标准输入读入用户的名称和口令，
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并利用这些信息来更新系统上已存在的用户的口令。
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在没有用 \-e 这个开关选项的情况下，口令将按明文的形式接收。
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如果使用了 \-e 选项，口令将只能以加密的方式传递。
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每行的具体格式如下所示：
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.sp 1
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\fI用户名\fR：\fI新口令\fR
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.sp 1
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用户名必须是系统上已存在的用户。
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输入的密码在必要时进行加密处理，
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如果口令文件具有时间特性，则同时更新。
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.PP
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此命令适用于大型的系统，在此类系统中，
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用户一般都是一次同时生成的，而用 adduser 和
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passwd 口令来对其一一进行设置一般说往往比较慢。
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.SH 注意事项
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.\" The \fBmkpasswd\fR command must be executed afterwards to update the
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.\" DBM password files.
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.\" This command may be discarded in favor of the newusers(8) command.
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因为可以使用文件重定向进行输入，
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即：chpasswd < user&passwd\-filename，
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如果输入文件是按非加密方式传递的话，请对该文件进行适当的加密。
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.SH 又见
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passwd(1),useradd(8),newuser(8)
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.SH 作者
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Julianne Frances Haugh (jfh@bga.com)
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.SH "[中文版维护人]"
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.B 所罗门 <solomen@email.com.cn>
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.SH "[中文版最新更新]"
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2000/11/26
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.SH "[中国 Linux 论坛 man 手册页翻译计划]"
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.TP
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.BI http://www.cmpp.net/
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