如何查询指定时间范围内的日志

搞代码的都离不开通过查看日志处理问题；服务器上记录的日志都比较大，不会把整个日志文件拿来分析，通常会截取时间范围内的日志来分析问题，介绍几种查询时间范围日志方法。

处理文件肯定是离不开linux三剑客grep、sed、awk的。

演示截取2点到9点的日志

测试日志文件test.log，模拟所有2点到11点日志

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{"timestamp":"2022-09-27T02:12:59+08:00","level":"debug"}
{"timestamp":"2022-09-27T02:14:42+08:00","level":"debug"}
{"timestamp":"2022-09-27T02:41:03+08:00","level":"debug"}
{"timestamp":"2022-09-27T02:45:59+08:00","level":"debug"}
{"timestamp":"2022-09-27T04:35:31+08:00","level":"debug"}
{"timestamp":"2022-09-27T04:35:31+08:00","level":"error"}
{"timestamp":"2022-09-27T04:35:31+08:00","level":"debug"}
{"timestamp":"2022-09-27T04:38:40+08:00","level":"debug"}
{"timestamp":"2022-09-27T04:49:55+08:00","level":"debug"}
{"timestamp":"2022-09-27T09:21:04+08:00","level":"debug"}
{"timestamp":"2022-09-27T09:21:04+08:00","level":"error"}
{"timestamp":"2022-09-27T09:21:04+08:00","level":"debug"}
{"timestamp":"2022-09-27T09:21:04+08:00","level":"error"}
{"timestamp":"2022-09-27T09:21:04+08:00","level":"debug"}
{"timestamp":"2022-09-27T09:21:19+08:00","level":"debug"}
{"timestamp":"2022-09-27T09:30:30+08:00","level":"debug"}
{"timestamp":"2022-09-27T09:30:35+08:00","level":"debug"}
{"timestamp":"2022-09-27T09:33:46+08:00","level":"debug"}
{"timestamp":"2022-09-27T09:37:02+08:00","level":"debug"}
{"timestamp":"2022-09-27T10:29:54+08:00","level":"debug"}
{"timestamp":"2022-09-27T10:29:59+08:00","level":"debug"}
{"timestamp":"2022-09-27T10:30:02+08:00","level":"debug"}
{"timestamp":"2022-09-27T10:30:03+08:00","level":"debug"}
{"timestamp":"2022-09-27T10:30:43+08:00","level":"debug"}
{"timestamp":"2022-09-27T10:30:44+08:00","level":"debug"}
{"timestamp":"2022-09-27T10:30:45+08:00","level":"debug"}
{"timestamp":"2022-09-27T10:30:46+08:00","level":"debug"}
{"timestamp":"2022-09-27T10:30:48+08:00","level":"debug"}
{"timestamp":"2022-09-27T10:56:22+08:00","level":"debug"}
{"timestamp":"2022-09-27T11:09:36+08:00","level":"debug"}
{"timestamp":"2022-09-27T11:09:41+08:00","level":"debug"}

正则方式

grep不支持范围，awk和sed支持范围，三个都支持正则匹配

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