shell脚本批量telnet ip port
PORT=XXXXXcount=0
for i in $(cat ip_list.dat)
do
((count++))
echo "count=$count"
# 关键代码，1s自动结束telnet
(sleep 1;) | telnet $i $PORT >> telnet_result.txt
done
# 根据结果判断出正常可以ping通的ip
cat telnet_result.txt | grep -B 1 \] | grep | awk '{print $3}' | cut -d '.' -f 1,2,3,4 > telnet_alive.txt
# 差集，得到ping不同的ip
cat ip_list.dat telnet_alive.txt | sort | uniq -u > telnet_die.txt
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