export bash script in linux with timestamp...

I have created export bash script in linux operating system to export schema and attached time of export with dump & log file..
- connect with oracle user
-home/backup.sh
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#!bin/bash
export DATE=$(date +"%m_%d_%y_%H:%M:%S_%p")
/u01/app/oracle/product/10.2.0/db_1/bin/exp rakesh/rakesh@rockdb file=/home/oracle/backups/rakesh$DATE.dmp log=/home/oracle/backups/rakesh$DATE.log statistics=none
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to run script...
./backup.sh