【需求描述】
统计10.240.210.171-180/24段的可用IP
【思路方法】
利用ping命令,如果结果返回为真(即[ $? -eq "0" ]),证明该IP对应的主机或终端是存活的,之后将对应IP追加到host_alive_lan.txt文件中,否则则将其追加到host_dead_lan.txt文件中,host_dead_lan.txt文件中的IP即为可用IP,用于分配给新机器。
【code】
#!/bin/bash
. /etc/init.d/functions
>host_alive_lan.txt
>host_dead_lan.txt
for n in $(seq 171 180)
do
ip="10.240.210.${n}"
#echo ${ip}
ping -c 1 -w 2 ${ip} &>/dev/null
if [ $? -eq "0" ]; then
echo "$ip" >>host_alive_lan.txt
action "10.240.210.${n}" /bin/true
else
echo "$ip" >>host_dead_lan.txt
action "10.240.210.${n}" /bin/false
fi
done
host_alive_num=$(wc -l host_alive_lan.txt|awk ‘{print $1}‘)
host_dead_num=$(wc -l host_dead_lan.txt|awk ‘{print $1}‘)
echo "***************The number of alive host is $host_alive_num***********"
echo "***************The number of dead host is $host_dead_num************"【运行后效果】
【统计一个B类网段可用IP】
#!/bin/bash
. /etc/init.d/functions
>host_alive.txt
>host_dead.txt
for m in $(seq 10 10 240)
do
for n in $(seq 3 254)
do
ip="10.240.${m}.${n}"
#echo ${ip}
ping -c 1 -w 2 ${ip} &>/dev/null
if [ $? -eq "0" ]; then
echo "$ip" >>host_alive.txt
action "$ip" /bin/true
else
echo "$ip" >>host_dead.txt
action "$ip" /bin/false
fi
done
done
host_alive_num=$(wc -l host_alive.txt|awk ‘{print $1}‘)
host_dead_num=$(wc -l host_dead.txt|awk ‘{print $1}‘)
echo "The number of computer which is on is $host_alive_num"
echo "The number of computer which is off is $host_dead_num"原文:http://xoyabc.blog.51cto.com/7401264/1698833