PXE ready a Pi

#!/bin/bash

function imagemaker {
echo "Your Device Identity is $(tput setaf 1)$(tput bold)$1$(tput sgr0)"
echo "Your Device IP Address after network boot will be: $(tput setaf 1)$(tput bold)$2$(tput sgr0)"
if [ ! -d /tftpboot/$1 ]
  then
mkdir -p /tftpboot/$1
cd /tftpboot/$1
ln -s ../workingbootcode/* .
cp cmdline.txt cmdline.txt.default
rm -f cmdline.txt
cat cmdline.txt.default | sed s/westpac/$1/g > cmdline.txt
rm -f cmdline.txt.default
mkdir /nfs/$1
cd /nfs/$1
echo
echo "$(tput setaf 3)$(tput blink)Now Creating Image, Please wait...$(tput sgr0)"
cp -rp /nfs/westpac/* .
echo
  echo "$(tput setaf 4)Image has been built on Server$(tput sgr0)"
  sleep 2s
  echo
  echo "$(tput setaf 5)Image building succesfull - please shutdown the pi after logging back in to complete network boot setup!$(tput sgr0)"
  echo "/nfs/$1 *(rw,sync,no_subtree_check,no_root_squash)" >> /etc/exports
  exportfs -r
sleep 2s
else
echo
  echo "$(tput setaf 1)$(tput blink)Image exists...qutting!$(tput sgr0)"
echo
sleep 2s
fi
exit 0
exit 0
}

function imageremove {
echo "Your Device Identity is $(tput setaf 1)$(tput bold)$1$(tput sgr0)"
if [ -d /tftpboot/$1 ]; then
echo
  echo "$(tput setaf 1)$(tput blink)Image exists...Removing it!$(tput sgr0)"
  exportfs -u *:/nfs/$1
sed -i /$1/d /etc/exports
rm -fr /tftpboot/$1
  rm -fr /nfs/$1
  exportfs -r
echo
echo "$(tput setaf 2)Image has been removed sucessfully...Bye!$(tput sgr0)"
echo
sleep 2s
  else
echo
  echo "$(tput setaf 1)$(tput blink)Image doesnt exists...Quitting!$(tput sgr0)"
sleep 2s
sed -i /$1/d /etc/exports
exportfs -r
echo
  fi
exit 0
}

sn[0]=$(tail -1 /proc/cpuinfo | grep -o ".\{8\}$")
IP=$(hostname -I)
echo
echo "$(tput setaf 1)$(tput bold)Welcome to Pi Nework boot creator...$(tput sgr0)"
echo
CHECK=$(vcgencmd otp_dump | grep 17:)

if [[ "$CHECK" == "17:3020000a" ]]; then
  echo "Boot mode fine :) ($CHECK)"
else
  echo "!!! Boot mode failed, value: $CHECK"
fi
read -e -p "Enter the Remote TFTP server IP...: " serverip
echo
echo 'Please enter your choice: '
echo

options=("Create Image on Server and Reboot" "Just reboot" "Shutdown" "Remove Image from Server" "Check firmware" "Update Firmware to enable Network Boot" "Quit")
select opt in "${options[@]}"
do
    case $opt in
        "Create Image on Server and Reboot")
            echo
    echo "You chose Option 1 ($(tput setaf 5)Please Wait - Loading you details to server$(tput sgr0))"
    index=$(printf "%1s"$sn)
    sshpass -p 'qwe' ssh -t -t -o StrictHostKeyChecking=no root@$serverip "`declare -f imagemaker`; imagemaker "$index" "$IP""
    sudo reboot
    break;;
        "Just reboot")
    echo
            echo "You chose Option 2"
            sudo reboot
            break;;
        "Shutdown")
    echo
            echo "You chose $REPLY which is $opt"
            sudo shutdown now
    break;;
        "Remove Image from Server")
    echo
    index1=$(printf "%1s"$sn)
    sshpass -p 'qwe' ssh -t -t -o StrictHostKeyChecking=no root@$serverip "`declare -f imageremove`; imageremove "$index1""
    ;;
        "Check firmware")
    echo
    CHECK=$(vcgencmd otp_dump | grep 17:)
    if [[ "$CHECK" == "17:3020000a" ]]; then
      echo "Boot mode fine :) ($CHECK)"
    else
      echo "!!! Boot mode failed, value: $CHECK"
    fi
    ;;
        "Update Firmware to enable Network Boot")
    echo
            echo "You chose $REPLY which is $opt"
    sudo apt-get install rpi-update && sudo rpi-update
    ;;
        "Quit")
            break
            ;;
        *) echo "invalid option $REPLY";;
    esac
done