Unable to connect to Oracle after executing .bash_profile - bash

Question

I have installed Oracle 11gR2 and want to connect with SQL*Plus but I can't.
I login in as root and then switch user to oracle as
su oracle
I have added required Oracle environment variables in .bash_profile but it is not executed when i switch to oracle user from root. Even executing the bash file manually does not export the variables using following command
$ ./.bash_profile
These are the contents of my .bash_profile:
#!/bin/bash
#.bash_profile
# Get the aliases and functions
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi
# User specific environment and startup programsotp
PATH=$PATH:$HOME/bin
export PATH
# Oracle Settings
TMP=/tmp; export TMP
TMPDIR=$TMP; export TMPDIR
ORACLE_HOSTNAME=orcl.genie.com; export ORACLE_HOSTNAME
ORACLE_UNQNAME=orcl; export ORACLE_UNQNAME
ORACLE_BASE=/u01/app/oracle; export ORACLE_BASE
ORACLE_HOME=$ORACLE_BASE/product/11.2.0/db_1; export ORACLE_HOME
ORACLE_SID=orcl; export ORACLE_SID
ORACLE_TERM=xterm; export ORACLE_TERM
PATH=$ORACLE_HOME/bin:/usr/sbin:$PATH; export PATH
LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib; export LD_LIBRARY_PATH
CLASSPATH=$ORACLE_HOME/JRE:$ORACLE_HOME/jlib:$ORACLE_HOME/rdbms/jlib; export CLASSPATH
if [ $USER = "oracle" ]; then
if [ $SHELL = "/bin/ksh" ]; then
ulimit -p 16384
ulimit -n 65536
else
ulimit -u 16384 -n 65536
fi
fi
umask 022

Answer 1

To check if you are running in a login shell, use the following command
shopt login_shell
if it displays
login_shell off
then you are not running in a login shell. You need to switch to oracle user with -l switch
su -l oracle
Hope, it solves your problem.