利用shell find命令删除过期的缓存方法示例
<p><span><strong>前言</strong></span></p>
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最近发现网站的缓存文件过多，达到100G，占据了大量硬盘，但是其实有很多缓存是不需要的，因为文件被访问的次数并不相同。通过查找相关的资料发现最节省硬盘的缓存方式就是只留下2天的缓存，因为一个网站的文件，总被大量访问的就那么几个。下面就来看看详细的解决方法吧。</p>
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<span><strong>方法如下</strong></span></p>
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<code class="bash functions">find</code> <code class="bash plain">/ -amin -10 </code><code class="bash comments"># 查找在系统中最后10分钟访问的文件</code>
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<code class="bash functions">find</code> <code class="bash plain">/ -atime -2 </code><code class="bash comments"># 查找在系统中最后48小时访问的文件</code>
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<code class="bash functions">find</code> <code class="bash plain">/ -mmin -5 </code><code class="bash comments"># 查找在系统中最后5分钟里修改过的文件</code>
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<code class="bash functions">find</code> <code class="bash plain">/ -mtime -1 </code><code class="bash comments">#查找在系统中最后24小时里修改过的文件</code>
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<code class="bash functions">find</code> <code class="bash plain">/usr/local/backups</code> <code class="bash plain">-mtime +10 -</code><code class="bash functions">exec</code> <code class="bash functions">rm</code> <code class="bash plain">-rf {} \;</code>
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<code class="bash functions">find</code> <code class="bash plain">/backup/logs</code> <code class="bash plain">-mtime -1 指定具体的目录，1天内修改过的。</code>
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<code class="bash functions">find</code> <code class="bash plain">/ -mtime +2 找到两天以前的</code>
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发现了么＋2 表示2天前的。－2表示两天以内的。</p>
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查到30天之前被访问的，并列出来</p>
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<code class="bash functions">find</code> <code class="bash plain">/backup/logs</code> <code class="bash plain">-atime +30 -</code><code class="bash functions">exec</code> <code class="bash functions">ls</code> <code class="bash plain">-l {} \;</code>
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查到30天之前被访问的，并删除</p>
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<code class="bash functions">find</code> <code class="bash plain">/backup/logs</code> <code class="bash plain">-atime +30 -</code><code class="bash functions">exec</code> <code class="bash functions">rm</code> <code class="bash plain">-rf {} \;</code>
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意义，当缓存文件太多的时候，需要经常的删除自己的缓存文件，来释放空间。一句命令，一天之行一次，这样被用户访问多的文件，自然就留下来了。而那些没被访问的就被删除了。</p>
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<span><strong>总结</strong></span></p>
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以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作能带来一定的帮助，如果有疑问大家可以留言交流。</p>
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