简单的shell script：循环测试网络状态

#!/bin/bash

# Program

# Use ping command to check the network's PC state.

# History

# 2009/02/18 VBird first release

PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin

export PATH

network="192.168.1" # 将网络的前面的部分定好！

for sitenu in $(seq 1 100) # seq 為 sequence(连续) 的缩写之意

do

# 底下的程式在取得 ping 的回传值是正确的还是错误的！

ping -c 1 -w 1 ${network}.${sitenu} &> /dev/null && result=0 || result=1

# 开始显示结果是正确的启动 (UP) 还是错误的没有联通(DOWN)

if [ "$result" == 0 ]; then

echo "Server ${network}.${sitenu} is UP."

else

echo "Server ${network}.${sitenu} is DOWN."

fi

done