shell计算两个日期之间的时间差(day-h:m:s)

2021年9月17日11:49:57 星期五

#!/bin/bash
#########################################################
# File name :           date_diff.sh                    #
# Platform :All Linux Based Platform                    #
# Version  :1.0                                         #
# Date     :2021-09-17                                  #
# Author   : Apple                                      #
# Contact  :                                            #
# Company  :                                            #
#########################################################

start=$1
end=$2

startDate=`date -d "${start}" +%s`
endDate=`date -d "${end}" +%s`

t=`expr $endDate - $startDate`
dayDiff=`expr $t / 86400`

t=`expr $t % 86400`
hourDiff=`expr $t / 3600`

t=`expr $t % 3600`
minuteDiff=`expr $t / 60`

secondDiff=`expr $t % 60`

echo dayDiff=${dayDiff}-${hourDiff}:${minuteDiff}:${secondDiff}

示例

[11:57:58][apple]$./date_diff.sh 'Tue Sep 7 21:07:59 CST 2021' 'Fri Sep 17 09:57:17 CST 2021'
dayDiff=9-12:49:18