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<article id="post-article/python/Python菜鸟教程学习笔记-循环语句" class="article article-type-post" itemscope itemprop="blogPost">
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<time datetime="2021-07-01T04:25:32.000Z" itemprop="datePublished">2021-07-01</time>
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<a class="article-title" href="/article/python/Python%E8%8F%9C%E9%B8%9F%E6%95%99%E7%A8%8B%E5%AD%A6%E4%B9%A0%E7%AC%94%E8%AE%B0-%E5%BE%AA%E7%8E%AF%E8%AF%AD%E5%8F%A5/">Python菜鸟教程学习笔记 - 循环语句</a>
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<img src="/asserts/images/logo/python.png" title="python" class="img-logo img-center" />
<h2 id="一、概述"><a href="#一、概述" class="headerlink" title="一、概述"></a>一、概述</h2><p>程序在一般情况下是按顺序执行的。<br>编程语言提供了各种控制结构，允许更复杂的执行路径。<br>本章要介绍的循环语句，允许我们执行一个语句或语句组多次。</p>
<h3 id="1-循环类型"><a href="#1-循环类型" class="headerlink" title="1. 循环类型"></a>1. 循环类型</h3><table>
<thead>
<tr>
<th>循环类型</th>
<th>描述</th>
</tr>
</thead>
<tbody><tr>
<td>while循环</td>
<td>在给定的判断条件为 true 时执行循环体，否则退出循环体。</td>
</tr>
<tr>
<td>for循环</td>
<td>重复执行语句</td>
</tr>
<tr>
<td>嵌套循环</td>
<td>你可以在while循环体中嵌套for循环</td>
</tr>
</tbody></table>
<h3 id="2-循环控制"><a href="#2-循环控制" class="headerlink" title="2. 循环控制"></a>2. 循环控制</h3><table>
<thead>
<tr>
<th>控制语句</th>
<th>描述</th>
</tr>
</thead>
<tbody><tr>
<td>break 语句</td>
<td>在语句块执行过程中终止循环，并且跳出整个循环。</td>
</tr>
<tr>
<td>continue 语句</td>
<td>在语句块执行过程中终止当前循环，跳出该次循环，执行下一次循环。</td>
</tr>
<tr>
<td>pass 语句</td>
<td>pass是空语句，是为了保持程序结构的完整性。</td>
</tr>
</tbody></table>
<h2 id="二、while循环"><a href="#二、while循环" class="headerlink" title="二、while循环"></a>二、while循环</h2><p>Python 编程中 while 语句用于循环执行程序，即在某条件下，循环执行某段程序，以处理需要重复处理的相同任务。</p>
<h3 id="1-语法格式"><a href="#1-语法格式" class="headerlink" title="1. 语法格式"></a>1. 语法格式</h3><blockquote>
<p>while 判断条件：<br> 执行语句……</p>
</blockquote>
<h3 id="2-实例"><a href="#2-实例" class="headerlink" title="2. 实例"></a>2. 实例</h3><figure class="highlight python"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">#!/usr/bin/env python</span></span><br><span class="line"><span class="comment">#coding=utf8</span></span><br><span class="line"></span><br><span class="line">count = <span class="number">0</span>;</span><br><span class="line"><span class="keyword">while</span> count < <span class="number">9</span>:</span><br><span class="line"> <span class="built_in">print</span> <span class="string">'The count is :'</span>, count</span><br><span class="line"> count = count + <span class="number">1</span>;</span><br><span class="line"></span><br><span class="line"><span class="built_in">print</span> <span class="string">"Good bye!"</span></span><br></pre></td></tr></table></figure>
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<a href="/article/python/Python%E8%8F%9C%E9%B8%9F%E6%95%99%E7%A8%8B%E5%AD%A6%E4%B9%A0%E7%AC%94%E8%AE%B0-%E5%BE%AA%E7%8E%AF%E8%AF%AD%E5%8F%A5/#more">阅读全文 >></a>
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<article id="post-article/soft/tools/如何使用xmind鱼骨头" class="article article-type-post" itemscope itemprop="blogPost">
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<time datetime="2017-01-17T10:40:00.000Z" itemprop="datePublished">2017-01-17</time>
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<a class="article-title" href="/article/soft/tools/%E5%A6%82%E4%BD%95%E4%BD%BF%E7%94%A8xmind%E9%B1%BC%E9%AA%A8%E5%A4%B4/">如何使用xmind鱼骨头</a>
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<h2 id="一、概述"><a href="#一、概述" class="headerlink" title="一、概述"></a>一、概述</h2><p>鱼骨图因常常被用于问题的分析以及解决方法，所以又被称为因果图。</p>
<h2 id="二、使用方式"><a href="#二、使用方式" class="headerlink" title="二、使用方式"></a>二、使用方式</h2><p>可以通过模板创建鱼骨头：</p>
<p><img src="http://www.xmindchina.net/uploads/images/support/yugutu-muban150703.png" alt="模板创建xmind鱼骨头"></p>
<p>也可以通过调整思维导图结构来实现鱼骨头：</p>
<p><img src="http://www.xmindchina.net/uploads/images/support/yugutu-jiegou150703.png" alt="思维导图结构调整"></p>
<h2 id="三、分析类型"><a href="#三、分析类型" class="headerlink" title="三、分析类型"></a>三、分析类型</h2><p>鱼骨头通过有两种类型：原因分析型和对策分析型。</p>
<h3 id="1-原因分析型"><a href="#1-原因分析型" class="headerlink" title="1. 原因分析型"></a>1. 原因分析型</h3><p>鱼头向右</p>
<p>针对分析“为什么”这类问题。</p>
<h3 id="2-对策分析型"><a href="#2-对策分析型" class="headerlink" title="2. 对策分析型"></a>2. 对策分析型</h3><p>鱼头向左</p>
<p>针对分析“如何、怎样”类型的问题。</p>
<h2 id="四、应用实例"><a href="#四、应用实例" class="headerlink" title="四、应用实例"></a>四、应用实例</h2><h3 id="1-原因分析型实例"><a href="#1-原因分析型实例" class="headerlink" title="1. 原因分析型实例"></a>1. 原因分析型实例</h3><p><img src="http://ocszqgifn.bkt.clouddn.com/meituan/%E9%B1%BC%E9%AA%A8%E5%A4%B4%E6%A1%88%E4%BE%8B-%E7%BA%BF%E4%B8%8A%E6%9C%8D%E5%8A%A1%E5%BC%82%E5%B8%B8.png" alt="鱼骨头案例-线上服务异常"></p>
<h3 id="2-对策分析型实例"><a href="#2-对策分析型实例" class="headerlink" title="2. 对策分析型实例"></a>2. 对策分析型实例</h3><p><img src="http://ocszqgifn.bkt.clouddn.com/meituan/%E9%B1%BC%E9%AA%A8%E5%A4%B4%E6%A1%88%E4%BE%8B-2017%E5%B9%B4%E5%BA%A6%E8%AE%A1%E5%88%92.png" alt="鱼骨头案例-2017年度计划"></p>
<h2 id="五、参考文档"><a href="#五、参考文档" class="headerlink" title="五、参考文档"></a>五、参考文档</h2><ul>
<li><a target="_blank" rel="noopener" href="http://www.xmindchina.net/jiqiao/xmind-huizhi-yugutu.html">如何绘制XMind的拿手好戏—鱼骨图</a></li>
<li><a target="_blank" rel="noopener" href="http://www.xmindchina.net/xinwen/yugu-fenxi.html">思维导图之鱼骨图</a></li>
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<a class="article-title" href="/article/js/%E5%9B%BE%E7%89%87%E5%8D%A0%E4%BD%8D%E7%AC%A6placeholder.js/">图片占位符placeholder.js</a>
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<p>图片占位符，图片由于诸如过大导致浏览器渲染慢、服务器端响应时间过长、页面需要加载的图片过多等原因导致图片未加载。<br>某些图片未成功渲染场景下，希望页面结构能大致保持不变。</p>
<p><strong>注：</strong> 同类型的先驱：<a target="_blank" rel="noopener" href="http://holderjs.com/">http://holderjs.com/</a><br>由于当前placeholder.js已经满足需求，因此暂不对比更加广泛使用的holderjs</p>
<h2 id="一、简介"><a href="#一、简介" class="headerlink" title="一、简介"></a>一、简介</h2><p>placeholder.js是一款轻量级的可在浏览器端生成占位图片的javascript库插件。该图片占位插件大小小于1kb，不依赖于任何js框架，并提供完善的配置参数和简单的方法。</p>
<h2 id="二、使用步骤"><a href="#二、使用步骤" class="headerlink" title="二、使用步骤"></a>二、使用步骤</h2><h3 id="1-引用类库"><a href="#1-引用类库" class="headerlink" title="1. 引用类库"></a>1. 引用类库</h3><figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><script src=<span class="string">"http://cdn.bootcss.com/placeholder.js/3.1.0/placeholder.js"</span>></script></span><br></pre></td></tr></table></figure>
<h3 id="2-使用方法"><a href="#2-使用方法" class="headerlink" title="2. 使用方法"></a>2. 使用方法</h3><h4 id="Programmatic-use-API-to-process-image-placeholder-getData-opts"><a href="#Programmatic-use-API-to-process-image-placeholder-getData-opts" class="headerlink" title="Programmatic use API to process image: placeholder.getData(opts)"></a>Programmatic use API to process image: placeholder.getData(opts)</h4><p>通过js程序设置图片src内容。</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="built_in">document</span>.getElementById(<span class="string">'img_holder'</span>).setAttribute(<span class="string">'src'</span>, <span class="built_in">window</span>.placeholder.getData(opts));</span><br></pre></td></tr></table></figure>
<h4 id="Image-onerror-event"><a href="#Image-onerror-event" class="headerlink" title="Image onerror event"></a>Image onerror event</h4><p>在img标签上添加onerror监听事件。</p>
<figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">onerror="this.src=placeholder.getData({size: '256x128', text: 'Image 404'})"</span><br></pre></td></tr></table></figure>
<h4 id="Use-image-config-attribute"><a href="#Use-image-config-attribute" class="headerlink" title="Use image config attribute."></a>Use image config attribute.</h4><figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag"><<span class="name">img</span> <span class="attr">class</span>=<span class="string">"placeholder"</span>></span></span><br><span class="line"><span class="tag"><<span class="name">img</span> <span class="attr">options</span>=<span class="string">"size=256x128&text=Hello!"</span> <span class="attr">class</span>=<span class="string">"placeholder"</span>></span></span><br><span class="line"><span class="tag"><<span class="name">img</span> <span class="attr">options</span>=<span class="string">"size=256x128&text=Hello%2525%26%3DWorld"</span> <span class="attr">class</span>=<span class="string">"placeholder"</span>></span></span><br></pre></td></tr></table></figure>
<p>这种方式，有几点使用注意事项：</p>
<ul>
<li>需要在所有img标签后添加渲染语句<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line"><script type=<span class="string">"text/javascript"</span>></span><br><span class="line"><span class="comment">// 使用第3类方式需要，执行此方法</span></span><br><span class="line">placeholder.render()</span><br><span class="line"></script></span><br></pre></td></tr></table></figure></li>
<li>options内text值需要做encodeURIComponent</li>
<li>img标签必须包含名为placeholder的class属性值</li>
</ul>
<h2 id="三、实例"><a href="#三、实例" class="headerlink" title="三、实例"></a>三、实例</h2><figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta"><!DOCTYPE <span class="meta-keyword">html</span>></span></span><br><span class="line"><span class="tag"><<span class="name">html</span>></span></span><br><span class="line"></span><br><span class="line"><span class="tag"><<span class="name">head</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">title</span>></span>placeholder实例<span class="tag"></<span class="name">title</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">meta</span> <span class="attr">charset</span>=<span class="string">"UTF-8"</span> /></span></span><br><span class="line"> <span class="tag"><<span class="name">meta</span> <span class="attr">http-equiv</span>=<span class="string">"X-UA-Compatible"</span> <span class="attr">content</span>=<span class="string">"IE=edge"</span> /></span></span><br><span class="line"> <span class="tag"><<span class="name">meta</span> <span class="attr">http-equiv</span>=<span class="string">"Content-Type"</span> <span class="attr">content</span>=<span class="string">"text/html; charset=UTF-8"</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">meta</span> <span class="attr">name</span>=<span class="string">"viewport"</span> <span class="attr">content</span>=<span class="string">"width=device-width, initial-scale=1"</span>></span></span><br><span class="line"></span><br><span class="line"> <span class="tag"><<span class="name">script</span> <span class="attr">src</span>=<span class="string">"http://cdn.bootcss.com/placeholder.js/3.1.0/placeholder.js"</span>></span><span class="tag"></<span class="name">script</span>></span></span><br><span class="line"><span class="tag"></<span class="name">head</span>></span></span><br><span class="line"></span><br><span class="line"><span class="tag"><<span class="name">body</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">p</span>></span>1. Programmatic use API to process image: placeholder.getData(opts)<span class="tag"></<span class="name">p</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">pre</span>></span>document.getElementById('img_holder').setAttribute('src', window.placeholder.getData(opts));<span class="tag"></<span class="name">pre</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">img</span> <span class="attr">id</span>=<span class="string">"img_holder"</span> <span class="attr">src</span>=<span class="string">""</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">script</span> <span class="attr">type</span>=<span class="string">"text/javascript"</span>></span><span class="javascript"></span></span><br><span class="line"><span class="javascript"> <span class="keyword">var</span> opts = {</span></span><br><span class="line"><span class="javascript"> <span class="attr">size</span>: <span class="string">'256x128'</span>,</span></span><br><span class="line"><span class="javascript"> <span class="attr">font</span>: {</span></span><br><span class="line"><span class="javascript"> <span class="attr">style</span>: <span class="string">'oblique'</span>,</span></span><br><span class="line"><span class="javascript"> },</span></span><br><span class="line"><span class="javascript"> <span class="attr">text</span>: <span class="string">'Hello World'</span></span></span><br><span class="line"><span class="javascript"> }</span></span><br><span class="line"><span class="javascript"> <span class="built_in">document</span>.getElementById(<span class="string">'img_holder'</span>).setAttribute(<span class="string">'src'</span>, <span class="built_in">window</span>.placeholder.getData(opts));</span></span><br><span class="line"><span class="javascript"> </span><span class="tag"></<span class="name">script</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">p</span>></span>2. Image onerror event<span class="tag"></<span class="name">p</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">pre</span>></span>onerror="this.src=placeholder.getData({size: '256x128', text: 'Image 404'})"<span class="tag"></<span class="name">pre</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">img</span> <span class="attr">id</span>=<span class="string">"img_holder2"</span> <span class="attr">src</span>=<span class="string">"404.png"</span> <span class="attr">onerror</span>=<span class="string">"this.src=placeholder.getData({size: '256x128', text: 'Image 404'})"</span>></span></span><br><span class="line"></span><br><span class="line"> <span class="tag"><<span class="name">p</span>></span>3. Use image config attribute.<span class="tag"></<span class="name">p</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">pre</span>></span><span class="symbol">&lt;</span>img class="placeholder"<span class="symbol">&gt;</span><span class="tag"></<span class="name">pre</span>></span></span><br><span class="line"></span><br><span class="line"> <span class="tag"><<span class="name">img</span> <span class="attr">class</span>=<span class="string">"placeholder"</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">pre</span>></span><span class="symbol">&lt;</span>img options="size=256x128&text=Hello!" class="placeholder"<span class="symbol">&gt;</span><span class="tag"></<span class="name">pre</span>></span></span><br><span class="line"></span><br><span class="line"> <span class="tag"><<span class="name">img</span> <span class="attr">options</span>=<span class="string">"size=256x128&text=Hello!"</span> <span class="attr">class</span>=<span class="string">"placeholder"</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">pre</span>></span><span class="symbol">&lt;</span>img options="size=256x128&text=Hello!&bgcolor=#ccc&color=#969696&fstyle=oblique&fweight=bold&fsize=40&ffamily=consolas" class="placeholder"<span class="symbol">&gt;</span><span class="tag"></<span class="name">pre</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">img</span> <span class="attr">options</span>=<span class="string">"size=256x128&text=Hello!&bgcolor=#ccc&color=#969696&fstyle=oblique&fweight=bold&fsize=40&ffamily=consolas"</span> <span class="attr">class</span>=<span class="string">"placeholder"</span>></span></span><br><span class="line"></span><br><span class="line"> <span class="tag"><<span class="name">script</span> <span class="attr">type</span>=<span class="string">"text/javascript"</span>></span><span class="javascript"></span></span><br><span class="line"><span class="javascript"> <span class="comment">// 使用第3类方式需要，执行此方法</span></span></span><br><span class="line"><span class="javascript"> placeholder.render()</span></span><br><span class="line"><span class="javascript"> </span><span class="tag"></<span class="name">script</span>></span></span><br><span class="line"></span><br><span class="line"><span class="tag"></<span class="name">body</span>></span></span><br><span class="line"></span><br><span class="line"><span class="tag"></<span class="name">html</span>></span></span><br></pre></td></tr></table></figure>
<h2 id="四、参考文档"><a href="#四、参考文档" class="headerlink" title="四、参考文档"></a>四、参考文档</h2><p>官方地址：<a target="_blank" rel="noopener" href="http://placeholder.cn/">http://placeholder.cn/</a><br>使用实例：<a target="_blank" rel="noopener" href="http://placeholder.cn/doc/demo.html">http://placeholder.cn/doc/demo.html</a></p>
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<a class="article-category-link" href="/categories/%E5%89%8D%E7%AB%AF%E8%AE%BE%E8%AE%A1/">前端设计</a>
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<ul class="article-tag-list" itemprop="keywords"><li class="article-tag-list-item"><a class="article-tag-list-link" href="/tags/js%E7%B1%BB%E5%BA%93/" rel="tag">js类库</a></li><li class="article-tag-list-item"><a class="article-tag-list-link" href="/tags/placeholder/" rel="tag">placeholder</a></li></ul>
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<article id="post-article/linux/samba搭建" class="article article-type-post" itemscope itemprop="blogPost">
<div class="article-meta">
<a href="/article/linux/samba%E6%90%AD%E5%BB%BA/" class="article-date">
<time datetime="2016-12-30T02:39:00.000Z" itemprop="datePublished">2016-12-30</time>
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<a class="article-title" href="/article/linux/samba%E6%90%AD%E5%BB%BA/">samba搭建</a>
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<div class="article-entry" itemprop="articleBody">
<h1 id="简介"><a href="#简介" class="headerlink" title="简介"></a>简介</h1><p>Samba是在Linux和UNIX系统上实现SMB协议的一个免费软件，由服务器及客户端程序构成。SMB（Server Messages Block，信息服务块）是一种在局域网上共享文件和打印机的一种通信协议，它为局域网内的不同计算机之间提供文件及打印机等资源的共享服务.</p>
<h1 id="安装"><a href="#安装" class="headerlink" title="安装"></a>安装</h1><p><strong>注意：要安装samba必须有机器的root权限</strong></p>
<ol>
<li>下载samba-3.5.8.tar.gz到/home/work/xxx/(此处可以用自己指定path)</li>
<li>解压tar zxvf samba-3.5.8.tar.gz</li>
<li>执行 cd samba-3.5.8/source3</li>
<li>执行 ./configure && make -j 4</li>
<li>root权限执行 make install</li>
</ol>
<h1 id="配置"><a href="#配置" class="headerlink" title="配置"></a>配置</h1><ol>
<li><p>执行 cd /usr/local/samba/ (默认安装到该路径下)</p>
</li>
<li><p>执行 vi lib/smb.conf (将下面的内容粘贴到smb.conf)</p>
<blockquote>
<p>[global]<br>diplay charset = utf8<br>unix charset = gbk<br>dos charset = gbk<br>workgroup = work<br>netbios name = work<br>server string = uc<br>security = user<br>[work]<br>comment = uc<br>path=/home/work<br>create mask = 0664<br>directory mask = 0775<br>writable = yes<br>valid users = work<br>browseable = yes</p>
</blockquote>
</li>
<li><p>配置项说明</p>
<blockquote>
<p>[global] 标识全局配置： 前三行是对编码的配置。<br>workgroup：设置服务器所要加入的工作组的名称，会在Windows 的“网上邻居”中能看到work工作组，可以在此设置所需要的工作组的名称。<br>netbios name：设置出现在“网上邻居”中的主机名。默认情况下，则使用真正的主机名。<br>server string：设置服务器主机的说明信息，当在Windows 的“网上邻居”中打开Samba 上设置的工作组时，在Windows 的资源管理器窗口，会列出“名称”和“备注”栏，其中“名称”栏会显示出Samba服务器的NetBios名称，而“备注”栏则显示出此处设置的“Samba Server”。当然，可以修改默认的“Sambe Server”，使用自己的描述信息。<br>security：设置Samba服务器的安全等级。默认情况下，使用user等级。<br>Samba服务器一共有四种安全等级：<br>（1）share:使用此等级，用户不需要帐号及密码可以登陆Samba服务器。<br>（2）user:使用此等级，由提供服务的Samba服务器检查用户帐号及密码。<br>（3）server:使用此等级，检查帐号及密码的工作可指定另一台Samba服务器负责。<br>（4）domain:使用此等级，需要指定一台Windows NT/2000/XP服务器（通常为域控制器），以验证用户输入的帐号及密码。<br>[work]标识Samba文件共享配置（中括号中名称任意）<br>comment: 针对共享资源所作的说明、注释部分。<br>path: 若共享资源是目录，则指定目录的位置；若为打印机，则指定打印机队列的位置。<br>create mask: 设置文件的访问权限，默认值为0744。<br>directory mask: 设置目录的访问权限，默认值为0755。<br>writeable: 设置共享的资源是否可以写入。若共享资源是打印机，则不需设置此参数<br>valid users: 设置合法用户名。<br>browseable: 设置用户是否可以看到此共享资源。默认值为yes，若将此参数设置为no，用户虽然看不到此资源，但是拥有权限的用户仍可直接输入该资源的网址来访问该资源</p>
</blockquote>
</li>
</ol>
<h1 id="启动和使用samba"><a href="#启动和使用samba" class="headerlink" title="启动和使用samba"></a>启动和使用samba</h1><ol>
<li><p>执行 vi ~/.bash_profile(在文件里添加如下内容), 保存退出</p>
<blockquote>
<p>export LD_LIBRARY_PATH=/usr/local/samba/lib:$LD_LIBRARY_PATH</p>
</blockquote>
</li>
<li><p>执行 . ~/.bash_profile</p>
</li>
<li><p>执行 ./bin/smbpasswd -a work (设置work的密码)</p>
</li>
<li><p>执行 cd /usr/local/samba/sbin</p>
</li>
<li><p>执行 ./smbd -D (启动samba)</p>
</li>
<li><p>ps auxf | grep smbd 查看进程是否启动; netstat –npl 查看samba端口号，默认会使用139、445两个端口号</p>
</li>
</ol>
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<ul class="article-tag-list" itemprop="keywords"><li class="article-tag-list-item"><a class="article-tag-list-link" href="/tags/linux/" rel="tag">linux</a></li><li class="article-tag-list-item"><a class="article-tag-list-link" href="/tags/samba/" rel="tag">samba</a></li></ul>
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<article id="post-article/js/chrome插件：随机图片欣赏" class="article article-type-post" itemscope itemprop="blogPost">
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<time datetime="2016-12-29T03:17:00.000Z" itemprop="datePublished">2016-12-29</time>
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<a href="/article/js/chrome%E6%8F%92%E4%BB%B6%EF%BC%9A%E9%9A%8F%E6%9C%BA%E5%9B%BE%E7%89%87%E6%AC%A3%E8%B5%8F/#comments" title="查看评论">
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<a class="article-title" href="/article/js/chrome%E6%8F%92%E4%BB%B6%EF%BC%9A%E9%9A%8F%E6%9C%BA%E5%9B%BE%E7%89%87%E6%AC%A3%E8%B5%8F/">chrome插件：随机图片欣赏</a>
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<div class="article-entry" itemprop="articleBody">
<p>完整源码参见：<a target="_blank" rel="noopener" href="https://github.com/yeshaoting/chrome-plugin-study/tree/master/start">https://github.com/yeshaoting/chrome-plugin-study/tree/master/start</a></p>
<h2 id="一、插件文件"><a href="#一、插件文件" class="headerlink" title="一、插件文件"></a>一、插件文件</h2><h3 id="1-清单文件：manifest-json"><a href="#1-清单文件：manifest-json" class="headerlink" title="1. 清单文件：manifest.json"></a>1. 清单文件：manifest.json</h3><p>清单是chrome插件的入口，所有插件都要有这个文件。</p>
<p>包含插件的一些描述信息，例如：插件名称、版本号、允许请求的地址、展示的图标等。</p>
<p><strong>注：</strong>文件名称必须为maifest.json</p>
<h4 id="内容"><a href="#内容" class="headerlink" title="内容"></a>内容</h4><figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br></pre></td><td class="code"><pre><span class="line">{</span><br><span class="line"> "manifest_version": 2,</span><br><span class="line"></span><br><span class="line"> "name": "图片欣赏",</span><br><span class="line"> "description": "随机图片欣赏",</span><br><span class="line"> "version": "1.0",</span><br><span class="line"></span><br><span class="line"> "permissions": [</span><br><span class="line"> "https://secure.flickr.com/"</span><br><span class="line"> ],</span><br><span class="line"> "browser_action": {</span><br><span class="line"> "default_icon": "images/icon.png",</span><br><span class="line"> "default_popup": "popup.html"</span><br><span class="line"> }</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<h3 id="2-资源文件"><a href="#2-资源文件" class="headerlink" title="2. 资源文件"></a>2. 资源文件</h3><p>清单文件添加的图标(images/icon.png)、插件点击后弹出页面(popup.html)等。</p>
<p>资源文件都是在清单中定义的，通过清单描述找到。</p>
<h2 id="二、插件内页"><a href="#二、插件内页" class="headerlink" title="二、插件内页"></a>二、插件内页</h2><h3 id="1-功能"><a href="#1-功能" class="headerlink" title="1. 功能"></a>1. 功能</h3><p>本插件要实现的功能：</p>
<ul>
<li>展示一批图片</li>
<li>批量更换所有图片</li>
<li>更换单个图片</li>
</ul>
<h3 id="2-随机图片接口"><a href="#2-随机图片接口" class="headerlink" title="2. 随机图片接口"></a>2. 随机图片接口</h3><p>现成的API接口：<a target="_blank" rel="noopener" href="https://unsplash.it/300/300/?random=1">https://unsplash.it/300/300/?random=1</a></p>
<p>其中，random后面的值可以随机。</p>
<p><strong>注：</strong>接口存在一个问题，在同一个页面random值相同的话，页面展示的图片是相同的。因此，要保证初始页面的所有random值不一致。</p>
<h3 id="3-点击事件"><a href="#3-点击事件" class="headerlink" title="3. 点击事件"></a>3. 点击事件</h3><figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br></pre></td><td class="code"><pre><span class="line">$(<span class="built_in">document</span>).ready(<span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{</span><br><span class="line"> <span class="comment">// 换一批</span></span><br><span class="line"> $(<span class="string">"div.head a.refresh"</span>).click(<span class="function"><span class="keyword">function</span>(<span class="params">event</span>) </span>{</span><br><span class="line"> <span class="keyword">var</span> images = $(<span class="string">"a.thumbnail img"</span>).each(<span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{</span><br><span class="line"> change_img($(<span class="built_in">this</span>));</span><br><span class="line"> });</span><br><span class="line"></span><br><span class="line"> });</span><br><span class="line"></span><br><span class="line"> <span class="comment">// 单独更换</span></span><br><span class="line"> $(<span class="string">"a.thumbnail img"</span>).click(<span class="function"><span class="keyword">function</span>(<span class="params">event</span>) </span>{</span><br><span class="line"> change_img($(<span class="built_in">this</span>));</span><br><span class="line"> });</span><br><span class="line"></span><br><span class="line"> <span class="function"><span class="keyword">function</span> <span class="title">change_img</span>(<span class="params">$obj</span>) </span>{</span><br><span class="line"> <span class="keyword">var</span> url = <span class="string">"https://unsplash.it/300/300/?random="</span> + <span class="built_in">Math</span>.random();</span><br><span class="line"> $obj.attr(<span class="string">"src"</span>, url);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line">});</span><br></pre></td></tr></table></figure>
<h2 id="三、插件加载"><a href="#三、插件加载" class="headerlink" title="三、插件加载"></a>三、插件加载</h2><p>进入chrome扩展程序，勾选右上方开发者模式，然后点击“加载已解压的扩展程序”。</p>
<p>在弹出的文件查看对话框，选择开发的插件在磁盘上的存放位置。</p>
<p>确认完成后，就能看到开发的插件“图片欣赏”，展示在下面的扩展程序列表里了。</p>
<p>在chrome地址栏右侧的扩展插件中，就能看到并使用刚开发的插件了。</p>
<p><img src="http://7xkl4i.com1.z0.glb.clouddn.com/blog/Snip20161229_42.png" alt="加载插件"></p>
<h2 id="四、效果图"><a href="#四、效果图" class="headerlink" title="四、效果图"></a>四、效果图</h2><h3 id="1-插件效果图"><a href="#1-插件效果图" class="headerlink" title="1. 插件效果图"></a>1. 插件效果图</h3><p><img src="http://7xkl4i.com1.z0.glb.clouddn.com/blog/Snip20161229_40.png" alt="插件效果图"></p>
<h3 id="2-独立页面效果"><a href="#2-独立页面效果" class="headerlink" title="2. 独立页面效果"></a>2. 独立页面效果</h3><p><img src="http://7xkl4i.com1.z0.glb.clouddn.com/blog/Snip20161229_41.png" alt="独立页面效果"></p>
<h2 id="五、参考文档"><a href="#五、参考文档" class="headerlink" title="五、参考文档"></a>五、参考文档</h2><ul>
<li><a target="_blank" rel="noopener" href="https://crxdoc-zh.appspot.com/extensions/getstarted">入门：建立 Chrome 扩展程序</a></li>
<li><a target="_blank" rel="noopener" href="http://www.cnblogs.com/guogangj/p/3235703.html">Chrome插件（Extensions）开发攻略</a></li>
</ul>
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<h1 id="命令行监控工具Innotop"><a href="#命令行监控工具Innotop" class="headerlink" title="命令行监控工具Innotop"></a>命令行监控工具Innotop</h1><h2 id="一、工具简介"><a href="#一、工具简介" class="headerlink" title="一、工具简介"></a>一、工具简介</h2><p>innotop是一个基于命令行的监控工具，在某种方面模拟了UNIX中的top工具。</p>
<p>类似的命令行监控工具还有mtop和mytop，不过都不如innotop功能强大。</p>
<blockquote>
<p>INNOTOP是一个通过文本模式显示MySQL和InnoDB的监测工具。INNOTOP是用PERL语言写成的，这使它能更加灵活的使用在各种操作平台之上，它能详细的监控出当前MYSQL和INNODB运行的状态，以DBA根据结果，可以合理的优化MYSQL，让MYSQL更稳定更高效的运行。(摘自：参考文档3)</p>
</blockquote>
<h2 id="二、功能特性"><a href="#二、功能特性" class="headerlink" title="二、功能特性"></a>二、功能特性</h2><p>既然说到innotop功能很强大，到底能用来帮助我们做什么事情呢？</p>
<p>可以看一下innotop的功能特性如下：</p>
<ul>
<li>事务列表可以显示INNODB当前的全部事务。</li>
<li>查询列表可以显示当前正在运行的查询。</li>
<li>可以显示当前锁和锁等待的列表。</li>
<li>以相对值 显示服务器状态的变量和汇总信息。</li>
<li>有多种模式可用来显示INNODB内部信息，例如：缓冲区、死锁、外键错误、I/O活动情况、行操作、信号量以及其他更多的内容。</li>
<li>复制监控，将主服务器和从服务器的状态显示在一起。</li>
<li>显示任意服务器变量的模式。</li>
<li>服务器组可以更方便地组织多台服务器。</li>
<li>在命令行脚本下可以使用非交互式模式。</li>
</ul>
<h2 id="三、工具安装"><a href="#三、工具安装" class="headerlink" title="三、工具安装"></a>三、工具安装</h2><h3 id="1-源码安装"><a href="#1-源码安装" class="headerlink" title="1. 源码安装"></a>1. 源码安装</h3><p>最早innotop代码被托管到google code上，后来迁移到了github：<a target="_blank" rel="noopener" href="https://github.com/innotop/innotop">innotop</a></p>
<p>下载innotop源码，运行标准的make install安装过程即可。</p>
<p><strong>PS</strong>：八过网上的安装方式大多针对于linux系统而言。本人尝试在本机MAC系统下安装并没有那么简单，卡在安装perl的mysql连接库这块。MAC用户可以尝试使用下面的方法安装。</p>
<h3 id="2-brew安装"><a href="#2-brew安装" class="headerlink" title="2. brew安装"></a>2. brew安装</h3><p>通过MAC包管理工具brew搜索并安装innotop。</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">brew search innotop</span><br><span class="line">brew install innotop</span><br></pre></td></tr></table></figure>
<p>本人安装的innotop版本为1.11.1。</p>
<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">yerba-buena:~ yeshaoting$ innotop --version</span><br><span class="line">innotop Ver 1.11.1</span><br></pre></td></tr></table></figure>
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<h1 id="设置系统history"><a href="#设置系统history" class="headerlink" title="设置系统history"></a>设置系统history</h1><h2 id="一、history-记录设置"><a href="#一、history-记录设置" class="headerlink" title="一、history 记录设置"></a>一、history 记录设置</h2><h3 id="1-历史记录增加时间：HISTTIMEFORMAT"><a href="#1-历史记录增加时间：HISTTIMEFORMAT" class="headerlink" title="1. 历史记录增加时间：HISTTIMEFORMAT"></a>1. 历史记录增加时间：HISTTIMEFORMAT</h3><figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">HISTTIMEFORMAT='%F %T ' #注意有个空格，为了显示时日期与命令之间有空格分割。</span><br></pre></td></tr></table></figure>
<h3 id="2-历史命令记录显示行数：HISTSIZE"><a href="#2-历史命令记录显示行数：HISTSIZE" class="headerlink" title="2. 历史命令记录显示行数：HISTSIZE"></a>2. 历史命令记录显示行数：HISTSIZE</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">HISTSIZE=3000</span><br><span class="line">HISTFILESIZE=3000</span><br></pre></td></tr></table></figure>