starttime=date +'%Y-%m-%d %H:%M:%S'
#执行程序
endtime=date +'%Y-%m-%d %H:%M:%S'
start_seconds=$(date –date=”$starttime” +%s);
end_seconds=$(date –date=”$endtime” +%s);
echo “本次运行时间: “$((end_seconds-start_seconds))”s”

转载自:http://www.cnblogs.com/leixingzhi7/p/6281675.html