Shell Programming and Scripting

 Pseudo-terminal will not be  allocated because stdin is not a terminal.
 stty: : Invalid  argument
 stty: : Invalid  argument

 Code  for ssh
 for i in 0 1 2 3  4 5 6 7 8 9 10
 do
 ssh  ${HTNM[$i]} <<EOF
       if [ -f  file ];then
 XYZ
 else
 ABC
        fi
 exit
 EOF
 done

HTNM_ARR="host-app-dev-03 host-app-dev-04 host-app-dev-02"
set -A HTNM $HTNM_ARR

 for i in 0 1 2
 do
 ssh  ${HTNM[$i]} <<EOF
  echo " i m host ${HTNM[$i]}"
 exit
 EOF
 done

Pseudo-terminal will not be allocated because stdin is not a terminal.
stty: : Invalid argument
stty: : Invalid argument
i m host host-app-dev-03

stty: : Invalid argument
stty: : Invalid argument
i m host host-app-dev-03

#!/bin/bash
HTNM_ARR=("host-app-dev-03" "host-app-dev-04" "host-app-dev-02")
for i in 0 1 2
  do
    HTNM=${HTNM_ARR[i]}
     ssh -T "$HTNM" <<EOF
      echo "i m"  `hostname -s`
EOF
  done