shell脚本计算时间差

?

1 2 3 4 5 6 7 8 9 10 11 12

#! /bin/bash   beginTime=$(date "+%Y-%m-%d %H:%M:%S") echo "beginTime:" $beginTime   sleep 12   endTime=$(date "+%Y-%m-%d %H:%M:%S") echo "endtime:" $endTime   duration=$(($(date +%s -d "${endTime}")-$(date +%s -d "${beginTime}"))); echo "时间差:" $duration"s"

其中

?

1 2	%s表示seconds since 1970-01-01 00:00:00 UTC -d表示display time described by STRING, not 'now'

　　

执行演示：

?

1 2 3 4

# source a.sh beginTime: 2022-01-20 19:19:30 endtime: 2022-01-20 19:19:42 时间差: 12s