Shell Programming and Scripting

#!/bin/bash
clear
echo "Please enter the date for CD info wanted: \c"
read rrd_date
echo "Please enter CEC CEM or CEP: \c"
read file_name
sleep 2
# Create the output file with CEC CEP or CEM information
echo "Creating $file_name file"
cd /opt/cdunix/work/vcndm
sleep 2
grep $file_name S2*$rrd_date.* >~/rrd$rrd_date$file_name               
echo "output rrd$rrd_date$file_name file created"
sleep 2
FILE=~/rrd$rrd_date$file_name
echo $FILE
FS="|"
while read line
do
        # store field 1
        F1=$(echo $line | cut -d$FS -f1)
        echo "$F1" >>~/cdrrdout$rrd_date$file_name
        # store field 2
        F2=$(echo $line | cut -d$FS -f2)
        echo "$F2" >>~/cdrrdout$rrd_date$file_name
        # store field 18
        F18=$(echo $line | cut -d$FS -f18)
        echo "$F18" >>~/cdrrdout$rrd_date$file_name
        # store field 19
        F19=$(echo $line | cut -d$FS -f19)
        echo "$F19" >>~/cdrrdout$rrd_date$file_name
        echo " " >>~/cdrrdout$rrd_date$file_name
done < $FILE
echo "cdrrdout$rrd_date$file_name has been created"

echo ${file_name##*.}