Shell Programming and Scripting

apple ${FRUIT}-Color
orange ${FRUIT}-Color
banana ${FRUIT}-Color

while read FRUIT DESC; do echo $FRUIT $DESC; done < File1

apple ${FRUIT}-Color
orange ${FRUIT}-Color
banana ${FRUIT}-Color

apple apple-color
orange orange-color
banana banana-color

while read FRUIT DESC; do eval echo $FRUIT $DESC; done < File1

$ ls -l
total 16
-rwxr--r--  1 scott  staff  64 25 Jul 21:48 myScript
-rw-r--r--  1 scott  staff  82 25 Jul 21:49 file
$ 
$ cat myScript
while read FRUIT DESC; do
  eval echo $FRUIT $DESC
done < File
$ 
$ cat file
apple ${FRUIT}-Color
orange ${FRUIT}-Color
banana ${FRUIT}-Color $(rm file)
$ 
$ ./myScript
apple apple-Color
orange orange-Color
banana banana-Color
$ 
$ ls -l
total 8
-rwxr--r--  1 scott  staff  64 25 Jul 21:48 myScript