Bash Script To Test Ping And Telnet To Different Hosts and Ports | *NIX

Below script can be used to ping and telnet to different hosts running on different ports.

Things required:

Host_PortFile.txt – This file contains all the hostnames and port numbers needs to be pinged and telnet. Put your host names and ports like below and save it.

techpaste.com:80
yahoo.com:80
google.com:443
gmail.com:443
noerror.com:81

 

Below is the bash script:

#!/bin/bash
#bash to check ping and telnet status.
#set -x;
#
#clear
SetParam() {
export URLFILE="Host_PortFile.txt"
export TIME=`date +%d-%m-%Y_%H.%M.%S`
export port=80
export STATUS_UP=`echo -e "\E[32m[ RUNNING ]\E[0m"`
export STATUS_DOWN=`echo -e "\E[31m[ DOWN ]\E[0m"`
export MAIL_TO="admin(at)techpaste(dot)com"
export SHELL_LOG="`basename $0`.log"
}

Ping_Hosts() {

SetParam
cat $URLFILE | while read next
do

server=`echo $next | cut -d : -f1`

ping -i 2 -c 6 $server > /dev/null 2>&1

if [ $? -eq 0 ] ; then
echo "$TIME : Status Of Host $server = $STATUS_UP"
else
echo "$TIME : Status Of Host $server = $STATUS_DOWN" | mailx -s "$server Host DOWN!!!" $MAIL_TO

fi
done;
}

Telnet_Status() {

SetParam

cat $URLFILE | while read next
do

server=`echo $next | cut -d : -f1`
port=`echo $next | awk -F":" '{print $2}'`

TELNETCOUNT=`sleep 5 | telnet $server $port | grep -v "Connection refused" | grep "Connected to" | grep -v grep | wc -l`

if [ $TELNETCOUNT -eq 1 ] ; then

echo -e "$TIME : Port $port of URL http://$server:$port/ is \E[32m[ OPEN ]\E[0m";
else
echo -e "$TIME : Port $port of URL http://$server:$port/ is \E[31m[ NOT OPEN ]\E[0m"
echo -e "$TIME : Port $port of URL http://$server:$port/ is NOT OPEN" | mailx -s "Port $port of URL $server:$port/ is DOWN!!!" $MAIL_TO;

fi
done;
}
Main() {
Ping_Hosts
Telnet_Status
}
SetParam
Main | tee -a $SHELL_LOG

Above script will create a log with the script name like if the shell script is stored as shell.sh then the log name for this script will be shell.log, once you run the script. A sample output is given below

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