time1=$(date +%s -d '2014-01-13 22:46:05')
for((;;))
do
time2=$(date +%s)
time3=$((time1 - time2))
if [ $time3 -le ]
then
break;
fi
echo $time3
sleep $time3
done
补充说明:
shell 单括号运算符号:
a=$(date);
等同于:a=`date`;
双括号运算符:
a=$((1+2));
echo $a;
等同于:
a=`expr 1 + 2`