for循环实现

#! /bin/bash
prive=$(expr $RANDOM % 1000)
echo $prive
count=1
while true
do
        read -p "请输入一个1--1000的随机数：" num
        if [ $num -gt $prive ]; then
                echo "大了"
        elif [ $num -lt $prive ]; then
                echo "小了"
        else
                echo "两个数相等"
                echo $count
                exit 0
        fi
        let count++
done

#!/bin/bash
.  /etc/init.d/functions
check_fun(){
url_list=(www.baidu.com www.tudou.com www.youku.com www.xxx222.com)
for i in ${url_list[@]}
do
         curl -s -o /dev/null http://$i
         if [ $? -eq 0 ];then
                action "$i" /bin/true
        else
                action "$i" /bin/false
        fi
done
}
while :
do
        check_fun
        sleep 3
done