use getopts and shift

#！/bin/bash

while getopts "fh:" opt

do

           case "$opt" in

             f)

                  echo "option $opt  is specified"

                  ;;

             h)

               echo "option $opt  has value $OPTARG"

                ;;

            \?)

              echo "unknow option $OPTARG"

               ;;

           :)

                echo "no parameter value for option $OPTARG"

                 ;;

            *)

               echo ""unknown error"

               ;;

       esac

done

   shift $(($OPTIND -1))

for opt in "$@"

do

      if [ ! -f $2 ]

     then

         echo "cat not find file $opt"

    else

         echo "file the file $opt"

    fi

done

getopts 获取连字符后面的单字符变量，如果匹配成功在设置为匹配值，否则设置为?

shift向左偏移一个位置