grep记录的最后2分钟? [英] grep last 2 minutes of log?

问题描述

我有以下格式的日志文件. 我想每2分钟对日志进行一次grep检查并检查错误 使用shell脚本我怎么能得到这个? 任何帮助将不胜感激.

I have log file that is generated in below format. I want to grep the log every 2 minutes and check for error using shell script how Can I get this? Any help would be greatly appreciated.

[12:17:02.1274]
[12:18:01.1976]
[12:18:01.2151]
[12:18:01.2152]
[12:18:01.4607]
[12:18:02.6306]
[12:18:03.7299]
[12:18:04.0307]
[12:18:04.1388]
[12:18:04.2068]
[12:18:06.4002]
[12:18:07.5805]
[12:19:01.8559]
[12:19:08.9950]
[12:19:09.2851]
[12:19:10.4704]
[12:19:12.8167]
[12:20:01.8968]
[12:20:01.9206]
[12:20:01.9206]
[12:20:02.1707]
[12:20:02.3064]
[12:20:05.4461]
[12:20:13.7205]
[12:20:14.0807]
[12:20:14.2360]
[12:20:17.3764]
[12:21:01.2299]
[12:21:10.4769]
[12:21:18.8085]
[12:21:19.1106]
[12:21:19.2456]
[12:21:22.3663]

推荐答案

您可以使用睡眠功能.

尝试例如:

#!/bin/bash
echo start
sleep 2
echo end

两个回显命令之间将等待2秒.

Which will wait 2 seconds between the two echo commands.

您的完整脚本可能是:

#!/bin/bash    
while [ 1 ]; do
        sleep 2m
        if grep -qvE "^\[[0-9]{2}:[0-9]{2}:[0-9]{2}\.[0-9]{4}\]" logfile.dat
        then
                echo "ERROR"
        else
                echo "Everything is fine..."
        fi
done

while循环始终在运行，因为1是true.在此无限循环中，每两分钟(2m)完成一次检查.

The while-loop is always running because 1 is true. In this infinite loop each two minutes (2m) the check is done.

修改

我更新了代码，以便解析给定的数据结构.我将grep与

I updated the code so that the data structure you were given is parsed. I use grep with

• -E以启用正则表达式
• -v仅匹配反函数(这意味着它搜索您的结构，并且如果此模式不不匹配，则实际上是grepping)
• -q使用安静模式并在找到匹配项后立即退出

• -E to enable the usage of regex
• -v to match only the inverse (meaning that it searches for your structure and is actually grepping if this pattern isn't matching)
• -q to use quiet mode and exit immediately if a match is found

如果您的 logfile.dat 与您给出的样式不完全相同，则grep匹配，并且将 ERROR 写入通常是您终端的STDOUT.

If your logfile.dat is not exactly of the style you were giving, grep is matching and ERROR is written to STDOUT which typically is your terminal.

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