[fm@serv1 new_dir]$ . ./env_call.env
[fm@serv1 new_dir]$ ssh ${serv2}  "/tmp/new_dir/backup.sh ${env}"
Permission denied, please try again.
Permission denied, please try again.
Permission denied (publickey,gssapi-with-mic,password).
^CKilled by signal 2.

[fm@serv1 new_dir]$ ssh ${serv2}
Last login: Tue Jun 28 20:58:00 2016 from serv1
[fm@serv2 ~]$