Shell Programming and Scripting

#!/bin/bash
#Script to create menus and take action according to that selected menu item.
while :
  do
  clear
  echo "---------------------------------------------------------------------------"
  echo "            * * * * * * * * * *  Main Menu * * * * * * * * * * "
  echo "---------------------------------------------------------------------------"
  echo "[1] Set Udername and password for devices in format username:pasword"
  echo "[2] Set Destination path to where Device Backups should SAVE"
  echo "[3] Set eMail ID to whom alerts should send"
  echo "[4] Add new device to devices list "
  echo "[5] View Current Script runing directory"
  echo "[6] open VI TEXT Editor"
  echo "[7] View Current Device list"
  echo "[8] View Current Destination Path"
  echo "[9] View Current mail ID set for Alerts"
  echo "[0] Exit/stop"
  echo "---------------------------------------------------------------------------"
  echo -n "Enter your menu choice [1-9]:"
  read yourch

#-------------------Start Functions--------------------------------------
  case $yourch in
    1) read -p "Enter user credentials in format username:password
> " myname
       echo "$myname" > /root/script/credentials.txt ;;
    2) read -p "Enter Destination path
> " destpath
       echo "$destpath" > /root/script/dest_path.txt ;;
    3) read -p "Enter E-Mail ID
> " mailid
       echo "$mailid" > /root/script/mail_alert.txt ;;
    4) read -p "Enter new device details in format device:ipadd
> " dev
       echo "$dev" >> /root/script/device_info.txt ;;
    5) echo "Script Files are executing from below path"; pwd ; echo "Press a key. . ." ; read -n 1 ;;
    6) vi ;;
    7) FILE="/root/script/device_info.txt"
       echo "*** File - $FILE contents ***"
        cat $FILE ;;
    8) FILE="/root/script/dest_path.txt"
       echo "*** File - $FILE contents ***"
        cat $FILE ;;
    9) FILE="/root/script/mail_alert.txt"
       echo "*** File - $FILE contents ***"
        cat $FILE ;;
    0) exit 0
        ;;
       *) echo "Opps!!! Please select choice 1-9 or 8"
       echo "Press a key. . ."
       read -n 1
       ;;
  esac
done

id
ls -ld /root /root/script /root/script/device_info.txt /root/script/dest_path.txt /root/script/mail_alert.txt