array=("10.248.x.5" ,"10.248.x.6","10.248.x.7")
for element in ${array[@]}
do
  echo "----------------Host: ${element}-----------------"
  ssh root@${element} "ntpdate -u 10.248.xx.18"
done

10.248.68.18  这个是时间服务器
array=("10.248.x.5" ,"10.248.x.6","10.248.x.7")  这个是需要同步的主机