Shell Programming and Scripting

#!/bin/bash

sort -u file.txt | tr '[:upper:]' '[:lower:]' > /file2.txt

# ask user what they want to do
echo -e -n "\nWhich folder would you like to process?\n
1=folder1
2=folder3
3=folder6 
4=Exit
:  "
read SERVER

if [ "$SERVER" -eq "1" ]; then

DIR=folder1

clear
echo -e -n "\n"
echo "------Entering $DIR Folder------"
ls
echo -e -n "\nDone"

elif [ "$SERVER" -eq "2" ]; then

DIR=folder3

clear
echo -e -n "\n"
echo "------Entering $DIR Folder------"
cd /home/$DIR/
rm -f *
echo -e -n "\nDone"

elif [ "$SERVER" -eq "3" ]; then

DIR=folder6

clear
echo -e -n "\n"
echo "------Entering $DIR Folder------"
cd /home/$DIR/
rm -f *
echo -e -n "\nDone"

elif [ "$SERVER" -eq "4" ]; then
echo -e "\nFinished\n"

else
echo -e "\nUnknown action selected\n"
fi

case "$SERVER" in
1)
commands;
;;
2)
commands;
;;
*)
commands;
;;
esac

clean ( )
{
clear
echo -e -n "\n"
echo "------Entering $DIR Folder------"
cd /home/$DIR/
rm -f *
echo -e -n "\nDone"
}

2)
DIR=folder3
clean
;;
3)
DIR=folder6
clean