监控主机是否在线

#!/bin/bash
#监控主机存活频率
echo -n -e  "\t\t请输入查询的ip是否在线: " 
read IP
for ((;;)); do
	ping $IP -c 2  &>/dev/null
	if [ $? -eq 0 ];then 
		echo -e "\033[32m $IP is online \033[0m"
	else
		echo -e "\033[31m $IP is offline \033[0m"
	fi
	sleep 5
done

#!/bin/bash

#监控主机是否存活

read -p "请输入需要查询的主机ip: " IP

while true ; do 
	ping $IP -c 1 &>/dev/null
	if [ $? -eq 0 ]; then 
		echo -e "\033[32m $IP is online \033[0m"
	else
		echo -e "\033[31m $IP is offline \033[0m"
	fi
sleep 3
done