Original link: https://blog.kelu.org/tech/2022/09/14/batch-telnet-ports.html
The easiest way, of course, is to use ansible.
However, some of the customer’s production environments did not use ansible, so they wrote a simple script to test it.
focus point:
- At the beginning, the IP address of the network card
eth0was taken. - Save the
ip_infofile in the same directory and fill inip:portin each line
#!/bin/bash LOCALIP = ` ifconfig -a | grep eth0 -A 2|grep inet|grep -v 127.0.0.1|grep -v inet6|awk '{print $2}' |tr -d "addr:" ` check_telnet (){ for ip_port in $( cat ./ip_info|grep -v '^#' ) do CHECK_PORT = $( echo $ip_port |awk -F : '{print $2}' ) CHECK_IP = $( echo $ip_port |awk -F : '{print $1}' ) echo -e " \n " | telnet $CHECK_IP $CHECK_PORT |grep "Connected to \| Escape character" > /dev/null if [ $? -eq 0 ] ; then echo -e " $CHECK_IP \t $CHECK_PORT \t ok" else echo -e " $CHECK_IP \t $CHECK_PORT \t error!!!" fi done } check_telnet > result.log echo "========= $LOCALIP =============" cat result.log
This article is reprinted from: https://blog.kelu.org/tech/2022/09/14/batch-telnet-ports.html
This site is for inclusion only, and the copyright belongs to the original author.