Dear Friends ,
I have to install ORacle10g in RHEL5 . Now I need to take rman backup
and for this reason I make the following script :

============================
rman target / << !
run
{
allocate channel t1 type disk;
backup format 'df_%t_%s_%p'
(database);}
==============================

It works fine and does not prompt for any user name and password . But Now
I want a situation where this script wants username and password prompt
when it goes to run , i.e., I need username and password prompt during
running this script ?

Can anybdy plz help me .. ...

Off the top of my head I can't think of a way of doing this but you could get the script to check what users is running it and error if it detects the wrong user - thus prompting them to su to the correct user before re-running the script. - You will of course need to lock editing rights of the script down to the one user.

something like

if [[ `whoami` != "username" ]];
then
echo "Notice you are not "username" please su (Switch user) to username and re-run the script"
exit 1
else
## the rest of your script ##
fi