# cat date_test.sh
#!/bin/bash
date
date_start=`date +%s`
date_end=`date +%s`
date
min=`expr $date_end - $date_start`
echo "cost is "`expr $date_end - $date_start`" secs."
echo cost is `expr $min / 60` mins.
#!/bin/bash
date
date_start=`date +%s`
date_end=`date +%s`
date
min=`expr $date_end - $date_start`
echo "cost is "`expr $date_end - $date_start`" secs."
echo cost is `expr $min / 60` mins.