date 时间查计算

 参考：https://blog.csdn.net/whatday/article/details/107680594

[root@localhost moudle]# t1=`date -d '2023-02-23 15:47:52.505'`

[root@localhost moudle]# t2=`date -d '2023-02-23 15:48:52.505'`

[root@localhost moudle]# druation=`echo $(($(date +%s -d "${t2}") - $(date +%s -d "${t1}")))`

[root@localhost moudle]# echo ${druation}

60