While loop does not return control

Question

The following shell script works only for first server and does not loop to the next. I tried 0< before the ssh command but it still does not return to the shell script once connected.

#!/bin/sh while read IP do ssh [email protected] " ssh root@$IP 'ls -lht /log/cdr-csv/ ' " > /tmp/$IP.txt done << here_doc 18.17.6.19 18.17.10.24 here_doc 

How do I run the same command on the second server 18.17.10.24 ?

Answer 1

You should send to the remote server the script to be executed. The way your script is written will not work because the here_doc is evaluated locally, not remotely.

Take a look on this answer I provided to another user on this subject.

Answer 2

ssh reads stdin unless you provide the -n option. So, the first IP address is consumed by read IP and all the rest of the here-doc is consumed by ssh [email protected]. Change that to ssh -n [email protected]