Set single sign-on to SSH servers

gistfile1.sh

#First make sure you have expect package installed
#Prepare the ip addresses list using NMAP


#!/usr/bin/expect
set hostlist [open /path/to/ip_addresses_of_hosts_with_ssh_daemon.txt]
set ipaddrs [read $hostlist]

foreach line [split $ipaddrs \n] {

        spawn ssh-copy-id user@$line
        set pass "password"
        expect {
        "yes/no" {send "yes\r"}
        password: {send "$pass\r"; exp_continue}
                  }
}