you are right.
there is no stty command found in start_db .
In admin user .profile there are stty commands found .

like

alias reset='stty erase \^h kill \^u intr \^c'

stty erase \^h kill \^u intr ^C
stty cs8 -istrip -parity

so what action I need to take for this stty

anyway thx very much for yr support.
Regards,
Amit

I already explained what you should do in my post above.

Helo
thx for your support

Now problem is

I need to run start_db and other script as admin user

I changed admin profile where stty command as follow
if [ -t 0 ]
then
stty erase \^h kill \^u intr ^C
fi

but still got the same errors

stty: standard input: Invalid argument
stty: standard input: Invalid argument
stdin: is not a tty
stty: standard input: Invalid argument

One thing is sure that because of admin user profile loaded when these script are running thats why errors occurs.I checked that by removing - from su admin. But I want to run these scripts as admin user thats my requiremnts


Regards,
Amit

Even if you remove the - the scripts are still run as the admin user. I think that is your safest option if the scripts are working like that.