Connection test for multiple host

Question

I have simple script which show me if connection between server is working, problem is that now I have multiple number of servers which I want to check and I don't want to check one by one, would be good to add list of servers into file and script will be check each row in file. Anyone can help to extend script with loop

    SERVER=$1
PORT=$2
nc -z -v -G5 $SERVER $PORT &> /dev/null
result1=$?


if [  "$result1" != 0 ]; then
  echo  port $PORT is closed on $SERVER
else
  echo port $PORT is open on $SERVER
fi

The best is to transform your variables into arrays link this : unix.stackexchange.com/questions/508777/… — admstg
– admstg, Commented Mar 21, 2024 at 13:25
Are you wanting to check the same port or same list of ports on each server? Or specific ports on specific servers? It would help if you explained your use case a little more. — Wildcard
– Wildcard, Commented Mar 22, 2024 at 0:27

Schmaehgrunza · Accepted Answer · 2024-03-21 19:50:45Z

0

Do you mean this?

server.txt

[hostname or IP 1] [port 1]
[hostname or IP 2] [port 2]
[hostname or IP 3] [port 3]
[hostname or IP 4] [port 4]
[hostname or IP 5] [port 5]

#!/usr/bin/bash
while IFS=" " read -r SERVER PORT; do
  nc -z -v -G5 $SERVER $PORT &> /dev/null
  result1=$?

  if [  "$result1" != 0 ]; then
    echo "port $PORT is closed on $SERVER"
  else
    echo "port $PORT is open on $SERVER"
  fi
done < server.txt

answered Mar 21, 2024 at 19:50

Schmaehgrunza

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