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语法高亮,滚动条美化,设置页面调整
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<h2 id="补充说明">补充说明</h2>
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<p><strong>grpconv命令</strong> 用来开启群组的投影密码。Linux系统里的用户和群组密码,分别存放在<code>/etc</code>目录下的passwd和group文件中。因系统运作所需,任何人都得以读取它们,造成安全上的破绽。投影密码将文件内的密码改存在<code>/etc</code>目录下的shadow和gshadow文件内,只允许系统管理者读取,同时把原密码置换为“x”字符。投影密码的功能可随时开启或关闭,您只需执行grpconv指令就能开启群组投影密码。</p>
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<h3 id="语法">语法</h3>
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<pre><code>grpconv</code></pre>
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<pre><code class="language-bash">grpconv</code></pre>
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<h3 id="实例">实例</h3>
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<p>设置cdy组密码</p>
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<pre><code>groupmod --password 123456 cdy
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<pre><code class="language-bash">groupmod --password 123456 cdy
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cat /etc/group | grep cdy
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cdy:123456:1000: //看出密码是123456</code></pre>
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<p>启动影子系统</p>
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<pre><code>grpconv
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<pre><code class="language-bash">grpconv
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cat /etc/group | grep cdy
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cdy:x:1000: //看出密码段已经被x替代
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