Solaris

#!/bin/ksh
ORACLE_SID=VNP;export ORACLE_SID
echo $ORACLE_SID

echo "Please Specify the kind of backup you want to take"
echo "1) LEVEL 0 VNP"
echo "2) LEVEL 1 VNP"
echo "3) EXPORT BACKUP"
echo "Enter your option"

read option

while [ $option -gt 3 ]||[ $option -le 0 ]

do
echo "Please Enter the correct option"

read option

done

case $option in
1) echo "You are taking rman backup of DB Level 0"
   rman target sys/neovnp@vnp @/vnporadataSYSTEM/backupIncrementalVNP/Level0VNP.rc;
   exit;;
2) echo "You are taking rman backup of DB Level 1"
   rman target sys/neovnp@vnp @/vnporadataSYSTEM/backupIncrementalVNP/Level1VNP.rc;
   exit;;
3) echo "You are taking export backup of DB" 
   exp ccs_admin/codeccb@vnp file=/vnprctl/exp_ccs_admin.dmp log=/vnprctl/exp_ccs_admin.log;
   exit;;
esac

exit