【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】
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#!/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************"
/bin/mail -s "内网未使用ip列表-`date +'%F %T'`" -r "urname@urdomain.com" user1@urdomain.com user2@urdomain.com < host_dead_lan.txt
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【运行后效果】
【统计一个B类网段可用IP】
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#!/bin/bash. /etc/init.d/functions
>host_alive.txt>host_dead.txtfor 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 "$ip" /bin/false
fi
done
donehost_alive_num=$(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"
/bin/mail -s "内网未使用ip列表-`date +'%F %T'`" -r "urname@urdomain.com" user1@urdomain.com user2@urdomain.com < host_dead.txt
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