Shell Programming and Scripting

#!/usr/local/bin/bash

count=$(ping -c 1 $1 | grep 'received' | awk -F',' '{ print $2 }' | awk '{ print $1 }')
  if [ "$count" = "0" ]; then
    echo "$1 PING [FAILED]"
	else
	echo "$1 PING [OK]"
  fi
  
apache=`echo " " | telnet $1 80 | grep Connected | awk '{ print $1 }'`
  if [ "$apache" = "Connected" ]; then
    echo "$1 PORT 80 [OK]"
	else
    echo "$1 PORT 80 [FAILED]"
  fi
ssh=`echo " " | telnet $1 22 | grep Connected | awk '{ print $1 }'`
  if [ "$ssh" = "Connected" ]; then
    echo "$1 PORT 22 [OK]"
	else
    echo "$1 PORT 22 [FAILED]"
  fi
smtp=`echo " " | telnet $1 25 | grep Connected | awk '{ print $1 }'`
  if [ "$smtp" = "Connected" ]; then
    echo "$1 PORT 25 [OK]"
	else
    echo "$1 PORT 25 [FAILED]"
  fi
pop=`echo " " | telnet $1 110 | grep Connected | awk '{ print $1 }'`
  if [ "$pop" = "Connected" ]; then
    echo "$1 PORT 110 [OK]"
	else
    echo "$1 PORT 110 [FAILED]"
  fi

apache=`echo " " | telnet $1 80 | grep Connected | awk '{ print $1 }'`
echo " " | telnet $1 80 | grep Connected | awk '{ print $1 }'
++ echo ' '
++ telnet host.com 80
++ grep Connected
++ awk '{ print $1 }'
Connection closed by foreign host.
+ apache=Connected
  if [ "$apache" = "Connected" ]; then
    echo "$1 PORT 80 [OK]"
        else
    echo "$1 PORT 80 [FAILED]"
  fi
+ '[' Connected = Connected ']'
+ echo 'host.com PORT 80 [OK]'
host.com PORT 80 [OK]

telnet $1 80 2>/dev/null