In SQL*Plus, how do I change the prompt to show the connected user and database?

#Connect as oracle user and add the following line at the end of th glogin.sql script.

su - oracle
viĀ $ORACLE_HOME\sqlplus\admin\glogin.sql
set sqlprompt "_user '@' _connect_identifier > " 

#Now check

sqlplus / as sysdba
SYS @ LBTCI1 >