Checking ntp servers

$ cat check_ntp_server.sh
#!/bin/sh
###################################################################################
#      
#  SCRIPT:  Checks Internal and external DNS query.
#  Author:  Sam
#  Date:    Wed Apr 17 07:29 EDT 2015
#  Usage:   Simply run ./check_ntp_server.sh script.
#  Detail:  There is a file ntp.servers which includes ntp servers.
#  $ more ntp.servers
#  ntpserv01
#  ntpserv02
#  ntpserv03
#  ntpserv04    
#
for i in `cat ntp.servers`
do
        echo " "
        echo "Checking $i"
        ssh -q $i /usr/sbin/ntpq -p; echo " ";  echo "Checking FS"; df -h
        #ssh -q $i /usr/sbin/ntpq -p; echo " ";  echo "Checking FS"; df -h; echo ""; echo "Top Output"; top
done