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<h2><a NAME="s11.3"></a>11.3 影子工具</h2>
<p><a NAME="i644"></a><a NAME="i645"></a></p>
<p>对影子口令的支持在红帽子LINUX5.1中得到了显著的增强。影子工具包（shadow-utils）
中包含了好几个工具支持以下功能：
<ul>
<li>传统口令与影子口令之间的转换工具（pwconv, pwunconv）</li>
<li>验正口令，组和相应的影子文件（pwck, grpck）</li>
<li>以符合工业标准的方法增加，删除和修改用户帐户（useradd,
usermod,userdel）</li>
<li>以符合工业标准的方法增加，删除和修改用户组（groupadd, groupmod,
groupdel）</li>
<li>以符合工业标准的方法管理文件/etc/group
请注意：还有其它一些与这些工具相关的有趣之处：</li>
<li>无论是否被设置为影子模式，工具均能正常使用</li>
</ul>
<ul>
<li>工具被做稍许修改以支持红帽子软件的用户私有组模式。有关这些修改的描述请
看useradd的man手册。有关用户私有组的详细信息，请看第 <a HREF="doc077.htm#s11.1.3" tppabs="http://www.jjinfo.com/kjzc/wsxy/linux/doc077.htm#s11.1.3">11.1.3</a>. 节</li>
<li>adduser脚本被替换为指向/usr/sbin/useradd的连接</li>
</ul>
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