如何获取shell脚本的可选参数

cat option_sh
#!/bin/bash

echo $*
# get the optional arguments
while getopts f:t: value
do
case $value in
f )
RHOST_INFO=$OPTARG   # 从$OPTARG中获得参数值
;;
t )
TIMEOUT=$OPTARG
;;
esac
done

echo $@
shift $(($OPTIND-1))      # 偏移至后面的参数
echo $*
echo $1

if [ $TIMEOUT == "30" ]   # 获得的参数为字符串
then
echo here
fi
ngnlinux1 [** NONE **]/home/qius $
ngnlinux1 [** NONE **]/home/qius $ ./option_sh -t 30 -f ss  other paras
-t 30 -f ss other paras
-t 30 -f ss other paras

other paras

other

here