懒人Shell脚本》之四——日志条数动态实时统计

1、需求点

1）输入：日志实时更新：当前日志表以秒级更新日志，每秒有多条日志更新。格式如下：

2016-08-11 11:02:092016-08-11 11:02:092016-08-11 11:02:092016-08-11 11:02:092016-08-11 11:02:102016-08-11 11:02:102016-08-11 11:02:102016-08-11 11:02:102016-08-11 11:02:102016-08-11 11:02:102016-08-11 11:02:102016-08-11 11:02:102016-08-11 11:02:112016-08-11 11:02:112016-08-11 11:02:11

2）实时输出：每个时刻值对应的2016-08-11