ssh in bash script exits loop

Question

I am trying to run some commands on few remote hosts. I have the list of their ips in a file ips.txt (one ip per line).

#!/bin/bash

while IFS= read -r wip; do
    echo $wip
    ssh root@$wip "pkill pgm; cd /root/pgm; nohup ./pgm  > /dev/null 2>&1 &"
    echo "$wip end"
done < ips.txt

I am running the above script. But the problem is after reading the first ip the loop exits. But if i remove the ssh line, it prints all ips.

Answer 1

ssh reads everything from stdin (ips.txt).

Replace

ssh

with

ssh -n

---

See: man ssh