https://souljian.cn/tags/%E5%91%BD%E4%BB%A4/Recent content in 命令 on SoulJian小站Hugo -- gohugo.ioen-usSun, 30 Aug 2026 10:00:00 +0800https://souljian.cn/p/751088210/Sat, 29 Aug 2026 14:00:00 +0800https://souljian.cn/p/751088210/<h2 id="写在前面合法学习边界">写在前面：合法学习边界 </h2><p>本文讲 Linux Shell 基础知识，不涉及攻击。</p> <h2 id="一特殊符号分类">一、特殊符号分类 </h2><img src="https://souljian.cn/img/linux-privilege-escalation.svg" alt="特殊符号" /> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-text" data-lang="text"><span class="line"><span class="cl">管道/重定向/通配符/正则/变量/逻辑运算符 </span></span></code></pre></td></tr></table> </div> </div><h2 id="二常用符号">二、常用符号 </h2><div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span><span class="lnt">2 </span><span class="lnt">3 </span><span class="lnt">4 </span><span class="lnt">5 </span><span class="lnt">6 </span><span class="lnt">7 </span><span class="lnt">8 </span><span class="lnt">9 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-bash" data-lang="bash"><span class="line"><span class="cl"><span class="p">|</span> 管道符：将前一个命令输出作为后一个命令输入 </span></span><span class="line"><span class="cl">&gt; 重定向：输出到文件（覆盖） </span></span><span class="line"><span class="cl">&gt;&gt; 追加：追加到文件 </span></span><span class="line"><span class="cl"><span class="p">&amp;</span> 后台运行 </span></span><span class="line"><span class="cl"><span class="o">&amp;&amp;</span> 逻辑与：前一个成功才执行后一个 </span></span><span class="line"><span class="cl"><span class="o">||</span> 逻辑或：前一个失败才执行后一个 </span></span><span class="line"><span class="cl"><span class="p">;</span> 分号：多个命令顺序执行 </span></span><span class="line"><span class="cl">$ 变量引用：<span class="nv">$PATH</span> / <span class="nv">$$</span> / <span class="nv">$?</span> </span></span><span class="line"><span class="cl">~ 家目录：~/.ssh/ </span></span></code></pre></td></tr></table> </div> </div><h2 id="三小结">三、小结 </h2><p>Linux 特殊符号是 Shell 脚本的基础。掌握这些符号，可大幅提升命令行操作效率。</p>