I was able to create the if-elif-then-else code block on a separate script and validated working fine. However when I added the UNTIL or WHILE logic I'm getting the invalid response. I'm **NOT** expecting to get this response = **"invalid operation"** if I manually created the **VALIDATE.txt** file with either **"proceed"** or **"rollback"** inside the file. Please check my code below

**WHILE SCRIPT**

```
#!/bin/bash
FILE=/Users/lagot/Documents/BASH-TEST/VALIDATE.txt
ACTION=`cat /Users/lagot/Documents/BASH-TEST/VALIDATE.txt >>/dev/null 2>&1`
while [ ! -f "$FILE" ]
do
  echo "not exist"
  sleep 60
done

  if [ "${ACTION}" = "proceed" ];
    then
      echo "performing proceed"
      rm -rf $FILE
  elif [ "${ACTION}" = "rollback" ];
    then
      echo "performing rollback"
      rm -rf $FILE
  else
      echo "invalid operation"
      rm -rf $FILE
  fi

```

**UNTIL SCRIPT**

```
#!/bin/bash
FILE=/Users/lagot/Documents/BASH-TEST/VALIDATE.txt
ACTION=`cat /Users/lagot/Documents/BASH-TEST/VALIDATE.txt >>/dev/null 2>&1`
until [ -f "$FILE" ]
do
   echo "not exist"
   sleep 60
done
if [ "${ACTION}" = "proceed" ];
  then
    echo "performing proceed"
    rm -rf $FILE
elif [ "${ACTION}" = "rollback" ];
  then
    echo "performing rollback"
    rm -rf $FILE
else
    echo "invalid operation"
    rm -rf $FILE
fi

```

I created the VALIDATE.txt on a separate window and checked myself

```
lagot-pc:BASH-TEST lagot$ echo proceed >> VALIDATE.txt
lagot-pc:BASH-TEST lagot$ pwd
/Users/lagot/Documents/BASH-TEST
lagot-pc:BASH-TEST lagot$ cat /Users/lagot/Documents/BASH-TEST/VALIDATE.txt
proceed

```

I'm getting the invalid response **"invalid operation"** instead of **"performing proceed"** same also if I try to create the **VALIDATE.txt** and echo the **"rollback"** inside of the file

```
lagot-pc:BASH-TEST lagot$ ./while-script.sh
not exist
not exist
not exist
not exist
not exist
invalid operation

```