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<meta name="description" content="昨天帮朋友安装部署Mysql的时候，用mysqladmin给root用户设置了一个16位的随机密码，还没来得及记下来就被突然插进来的事儿打断了，等我回来的时候已经找不到这个密码了。像这样的事情在我身上已经发生过了2次，每次Google『Mysql忘记root密码』都没有找到可行的方案（ …">
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<header>
<h1 class="entry-title"><a href="/blog/2013/05/02/zhong-xin-she-zhi-mysqlde-rootmi-ma/">重新设置Mysql的root密码</a></h1>
<p class="meta">
<time datetime="2013-05-02T20:07:00+08:00" pubdate data-updated="true">May 2<span>nd</span>, 2013</time>
</p>
</header>
<div class="entry-content"><p>昨天帮朋友安装部署Mysql的时候，用<code>mysqladmin</code>给root用户设置了一个16位的随机密码，还没来得及记下来就被突然插进来的事儿打断了，等我回来的时候已经找不到这个密码了。像这样的事情在我身上已经发生过了2次，每次Google『Mysql忘记root密码』都没有找到可行的方案（可能是因为Mysql版本和网上这些提到的不一样导致重置失败），所以这次我要记下来一个自己确认可行的方案以供今后参考。</p>
<h2>我的环境版本</h2>
<ul>
<li>CentOS release 6.3 (Final)</li>
<li>mysql Ver 14.14 Distrib 5.1.69, for redhat-linux-gnu (x86_64) using readline 5.1</li>
</ul>
<h2>问题描述</h2>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class='bash'><span class='line'>mysqladmin -u root -p randompassword
</span></code></pre></td></tr></table></div></figure>
<p>之后，忘记了<code>randompassword</code>，无法登陆<code>mysql</code>，需要找回root密码。</p>
<h2>解决方案</h2>
<ol>
<li>修改<code>mysqld</code>的配置文件`/etc/my.cnf’，在每个section里追加一条设置：「skip-grant-tables 」，比如：</li>
</ol>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
</pre></td><td class='code'><pre><code class='bash'><span class='line'><span class="o">[</span>mysqld<span class="o">]</span>
</span><span class='line'><span class="nv">datadir</span><span class="o">=</span>/var/lib/mysql
</span><span class='line'><span class="nv">socket</span><span class="o">=</span>/var/lib/mysql/mysql.sock
</span><span class='line'>skip-grant-tables
</span></code></pre></td></tr></table></div></figure>
<ol>
<li>重启<code>mysqld</code>。</li>
<li>登陆<code>mysql</code>，修改root密码。</li>
</ol>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
</pre></td><td class='code'><pre><code class='bash'><span class='line'>> mysql -u root
</span><span class='line'>mysql> USE mysql;
</span><span class='line'>mysql> UPDATE user SET <span class="nv">Password</span><span class="o">=</span>password <span class="o">(</span><span class="s1">'new-password'</span><span class="o">)</span> WHERE <span class="nv">User</span> <span class="o">=</span> <span class="s1">'root'</span>;
</span><span class='line'>mysql> FLUSH PRIVILEGES;
</span></code></pre></td></tr></table></div></figure>
<ol>
<li>将<code>/etc/my.cnf</code>更改回来。</li>
<li>重启<code>mysqld</code>。</li>
</ol>
<p><span style="color: red;">注意: </span>「skip-grant-tables」模式是忽略权限认证的意思，所以在上述<code>步骤1</code>开始前先保证外人无法连接你的<code>mysqld</code>。</p>
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<article>
<header>
<h1 class="entry-title"><a href="/blog/2013/04/26/alfred-workflow-shi-yao-zhi-de-mai/">Alfred Workflow: 什么值得买</a></h1>
<p class="meta">
<time datetime="2013-04-26T18:08:00+08:00" pubdate data-updated="true">Apr 26<span>th</span>, 2013</time>
</p>
</header>
<div class="entry-content"><p>作为一个命令行控，一向能用命令的我都会用命令。记得5，6年前Firefox有一个扩展叫做Ubiquity，相当于浏览器上的一个Shell，用户可以通过Web技术开发命令行工具，比如Gmail, Map, 点评等，不知后来此项目为什么夭折了。</p>
<p>什么是Alfred的workflow？如果你是Mac用户，那么你可以看看<a href="http://www.alfredapp.com/powerpack/">官方介绍</a>。 <br/>
今天有点时间为<a href="http://www.smzdm.com">什么值得买</a>写了一个Alfred的workflow: <a href="https://github.com/dlutcat/alfred-smzdm-workflow">alfred-smzdm-workflow</a>，方便随时查看smzdm最新发布的优惠信息。</p>
<p>下载：<a href="https://github.com/dlutcat/alfred-smzdm-workflow/blob/master/smzdm.alfredworkflow?raw=true">smzdm.alfredworkflow</a><br/>
源码：<a href="https://github.com/dlutcat/alfred-smzdm-workflow">Github</a><br/>
截图：<br/>
<img src="http://img1.kantuban.com/pin/f816f2f8817aa2a698a8f84185f8ac5c" alt="" /></p>
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<article>
<header>
<h1 class="entry-title"><a href="/blog/2013/03/08/macying-wen-xi-tong-xia-itunesdao-ru-zhong-wen-ge-qu-luan-ma-de-jie-jue-fang-fa/">Mac英文系统下iTunes导入中文歌曲乱码的解决方法</a></h1>
<p class="meta">
<time datetime="2013-03-08T20:09:00+08:00" pubdate data-updated="true">Mar 8<span>th</span>, 2013</time>
</p>
</header>
<div class="entry-content"><p>为了命令行的方便，我的Mac一直用的都是英文的系统。今天我往iTunes里导入中文歌曲的时候发现歌曲名，专辑名，作者名全是乱码，网上搜到的解决方案没有几个靠谱的。于是，还是自己用Python写了个脚本来搞定吧。</p>
<p>我的MP3文件的ID3信息编码都是GBK的，把它转成UTF8就OK了。读写ID3信息的库我用的是<a href="https://code.google.com/p/mutagen/">Mutagen</a>，接口简单，示例文档小巧。我在转编码的时候遇到一个难点，就是怎么把下面unicode中的编码decode?</p>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class='python'><span class='line'><span class="n">s</span> <span class="o">=</span> <span class="s">u"COMM=='chi'=www.lizhizhuangbi.com</span><span class="se">\n</span><span class="s">TALB=</span><span class="se">\xb1\xbb\xbd\xfb\xbc\xc9\xb5\xc4\xd3\xce\xcf\xb7\n</span><span class="s">TDRC=2004</span><span class="se">\n</span><span class="s">TIT2=</span><span class="se">\xbf\xa8\xb7\xf2\xbf\xa8\n</span><span class="s">TPE1=</span><span class="se">\xc0\xee\xd6\xbe\n</span><span class="s">TPE2=</span><span class="se">\xc0\xee\xd6\xbe</span><span class="s">"</span>
</span></code></pre></td></tr></table></div></figure>
<p>看上去原信息是GBK编码，可是怎么decode呢?Mutagen返回的直接就是unicode，没法decode 。最后只能尝试直接读取字符流，然后按照GBK来decode才成功。下面的<code>decode_gbk_from_unicode(s)</code>就是实现逻辑。</p>
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<a href="/blog/2013/05/02/zhong-xin-she-zhi-mysqlde-rootmi-ma/">重新设置Mysql的root密码</a>
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<a href="/blog/2013/04/26/alfred-workflow-shi-yao-zhi-de-mai/">Alfred workflow: 什么值得买</a>
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<a href="/blog/2013/03/08/macying-wen-xi-tong-xia-itunesdao-ru-zhong-wen-ge-qu-luan-ma-de-jie-jue-fang-fa/">Mac英文系统下iTunes导入中文歌曲乱码的解决方法</a>
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