I have a text file in which I have a list of servers. I'm trying to read the server one by one from the file, `SSH` in the server and execute `ls` to see the directory contents. My loop runs just once when I run the `SSH` command, however, for `SCP` it runs for all servers in the text file and exits, I want the loop to run till the end of text file for SSH. Following is my bash script, how can I make it run for all the servers in the text file while doing `SSH`?

```
#!/bin/bash
while read line
do
    name=$line
    ssh abc_def@$line "hostname; ls;"
#   scp /home/zahaib/nodes/fpl_* abc_def@$line:/home/abc_def/
done < $1

```

I run the script as `$ ./script.sh hostnames.txt`