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语法高亮，滚动条美化，设置页面调整

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docs/linux/nc.html
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<h2 id="补充说明">补充说明</h2>
<p><strong>nc命令</strong> 用于设置路由器。执行本指令可设置路由器的相关参数。</p>
<h3 id="语法">语法</h3>
<pre><code>nc [-hlnruz][-g&lt;网关...&gt;][-G&lt;指向器数目&gt;][-i&lt;延迟秒数&gt;][-o&lt;输出文件&gt;][-p&lt;通信端口&gt;]
<pre><code class="language-bash">nc [-hlnruz][-g&lt;网关...&gt;][-G&lt;指向器数目&gt;][-i&lt;延迟秒数&gt;][-o&lt;输出文件&gt;][-p&lt;通信端口&gt;]
[-s&lt;来源位址&gt;][-v...][-w&lt;超时秒数&gt;][主机名称][通信端口...]</code></pre>
<h3 id="选项">选项</h3>
<pre><code>-g&lt;网关&gt; 设置路由器跃程通信网关，最丢哦可设置8个。
<pre><code class="language-bash">-g&lt;网关&gt; 设置路由器跃程通信网关，最丢哦可设置8个。
-G&lt;指向器数目&gt; 设置来源路由指向器，其数值为4的倍数。
-h 在线帮助。
-i&lt;延迟秒数&gt; 设置时间间隔，以便传送信息及扫描通信端口。
@@ -22,19 +22,19 @@
-z 使用0输入/输出模式，只在扫描通信端口时使用。</code></pre>
<h3 id="实例">实例</h3>
<p>TCP端口扫描</p>
<pre><code>[root@localhost ~]# nc -v -z -w2 192.168.0.3 1-100
<pre><code class="language-bash">[root@localhost ~]# nc -v -z -w2 192.168.0.3 1-100
192.168.0.3: inverse host lookup failed: Unknown host
(UNKNOWN) [192.168.0.3] 80 (http) open
(UNKNOWN) [192.168.0.3] 23 (telnet) open
(UNKNOWN) [192.168.0.3] 22 (ssh) open</code></pre>
<p>扫描192.168.0.3 的端口 范围是 1-100 扫描UDP端口</p>
<pre><code>[root@localhost ~]# nc -u -z -w2 192.168.0.1 1-1000 # 扫描192.168.0.3 的端口 范围是 1-1000</code></pre>
<pre><code class="language-bash">[root@localhost ~]# nc -u -z -w2 192.168.0.1 1-1000 # 扫描192.168.0.3 的端口 范围是 1-1000</code></pre>
<p>扫描指定端口</p>
<pre><code>[root@localhost ~]# nc -nvv 192.168.0.1 80 # 扫描 80端口
<pre><code class="language-bash">[root@localhost ~]# nc -nvv 192.168.0.1 80 # 扫描 80端口
(UNKNOWN) [192.168.0.1] 80 (?) open
y //用户输入</code></pre>
<p>查看从服务器到目的地的出站端口 443 是否被防火墙阻止</p>
<div class="sourceCode" id="cb6"><pre class="sourceCode bash"><code class="sourceCode bash"><a class="sourceLine" id="cb6-1" data-line-number="1"><span class="ex">nc</span> -vz acme-v02.api.letsencrypt.org 443 -w2</a>
<div class="sourceCode" id="cb6"><pre><code class="language-bash"><a class="sourceLine" id="cb6-1" data-line-number="1"><span class="ex">nc</span> -vz acme-v02.api.letsencrypt.org 443 -w2</a>
<a class="sourceLine" id="cb6-2" data-line-number="2"><span class="co"># Ncat: Version 7.50 ( https://nmap.org/ncat )</span></a>
<a class="sourceLine" id="cb6-3" data-line-number="3"><span class="co"># Ncat: Connected to 23.77.214.183:443.</span></a>
<a class="sourceLine" id="cb6-4" data-line-number="4"><span class="co"># Ncat: 0 bytes sent, 0 bytes received in 0.07 seconds.</span></a></code></pre></div>