语法高亮，滚动条美化，设置页面调整

docs/linux/grpunconv.html

@@ -3,15 +3,15 @@
 <h2 id="补充说明">补充说明</h2>
 <p><strong>grpunconv命令</strong> 用来关闭群组的投影密码。它会把密码从gshadow文件内，回存到group文件里。</p>
 <h3 id="语法">语法</h3>
-<pre><code>grpunconv</code></pre>
+<pre><code class="language-bash">grpunconv</code></pre>
 <h3 id="实例">实例</h3>
 <p>未关闭的情况</p>
-<pre><code>cat /etc/gshadow | grep cdy
+<pre><code class="language-bash">cat /etc/gshadow | grep cdy
 cdy:123456::</code></pre>
 <p>关闭影子密码</p>
-<pre><code>cat /etc/gshadow
+<pre><code class="language-bash">cat /etc/gshadow
 cat: /etc/gshadow: 没有那个文件或目录</code></pre>
 <p>查看密码已经复制到<code>/etc/group</code>中了。</p>
-<pre><code>cat /etc/group | grep cdy
+<pre><code class="language-bash">cat /etc/group | grep cdy
 cdy:123456:1000:</code></pre>
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