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<!DOCTYPE html>
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<title>过滤日志目录中所有日志里最近1小时的错误记录及上下5行 | 云海鹰影</title>
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<h1 class="kratos-entry-title text-center">过滤日志目录中所有日志里最近1小时的错误记录及上下5行</h1>
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<span>
<i class="fa fa-calendar"></i> 2019-12-11
<i class="fa fa-folder"></i> 分类 <a class="label-link" href="/categories/%E7%BC%96%E7%A8%8B%E5%9F%BA%E7%A1%80/">编程基础</a>, <a class="label-link" href="/categories/%E7%BC%96%E7%A8%8B%E5%9F%BA%E7%A1%80/linux%E5%9F%BA%E7%A1%80/">linux基础</a>
<i class="fa fa-user"></i> 作者 云海鹰影
<i class="fa fa-edit"></i>
1299
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本文最后编辑于 <time datetime="1615457057391"></time> 前，其中的内容可能需要更新。
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<p>这里假设日志文件中的时间标准格式为：<code>[YYYY-mm-ddTHH:MM:SS.ZZZ]</code><br>例如，日志格式：</p>
<figure class="highlight plaintext" data-lang="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></pre></td><td class="code"><pre><span class="line">[2019-12-11T15:15:05.533] [INFO] default - Executing (default): SELECT count(*) AS `count` FROM `watch` AS `watch` WHERE `watch`.`fmid` = 25;</span><br><span class="line">{</span><br><span class="line"> "i": "am",</span><br><span class="line"> "a": "json file"</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<p>命令：</p>
<figure class="highlight bash" data-lang="bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">find ./ -<span class="built_in">type</span> f -mmin -60 |xargs awk <span class="string">'$1~/[0-9]{4}-[0-9]{2}-[0-9]{2}/ {t=substr($1,2,19); h=strftime("%Y-%m-%dT%T", systime()-3600); if(t>h){print $0; curline=NR}} curline>0&&NR>curline&&NR<=curline+999 {if (FNR==1) {curline=0} else {print $0}}'</span> | grep <span class="string">"ERROR"</span> -A 5 -B 5</span><br></pre></td></tr></table></figure>
<p>解释：</p>
<ul>
<li><code>find ./ -type f -mmin -60</code> 找到一小时以内修改过的文件</li>
<li><code>'$1~/[0-9]{4}-[0-9]{2}-[0-9]{2}/</code> 匹配日期行，对于日期行执行后面大括号的动作</li>
<li><code>t=substr($1,2,19);</code> 取中括号中的日期</li>
<li><code>h=strftime("%Y-%m-%dT%T", systime()-3600);</code> 取当前时间一个小时前的日期</li>
<li><code>if(t>h){print $0; curline=NR}</code> 比较日期，如果在一小时内，则打印该行，并记录当前行号</li>
<li><code>curline>0&&NR>curline&&NR<=curline+999</code> 匹配上一次打印的日期行后面的行，尽量覆盖直至下一个日期行，匹配到就执行后面的大括号里的动作</li>
<li><code>if (FNR==1) {curline=0} else {print $0}</code> 如果切换了下一个文件，就重置匹配日期行记录（不然后面的文件假如开头不是符合条件的行也都会打印出来），否则就继续打印当前文件的剩余行</li>
<li><code>grep "ERROR" -A 5 -B 5</code> 在前面打印的所有行中将ERROR前后5行过滤出来</li>
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