[oracle@localhost ~]$ source .bash_profile 

[oracle@localhost ~]$ echo $ORACLE_HOME
/home/oracle/app/oracle/product/11.2.0/dbhome_1

[oracle@localhost ~]$ lsnrctl start

[oracle@localhost ~]$ sqlplus /nolog

SQL*Plus: Release 11.2.0.1.0 Production on Wed Oct 19 14:29:10 2016

Copyright (c) 1982, 2009, Oracle. All rights reserved.

SQL> conn / as sysdba
Connected to an idle instance.
SQL> startup
ORACLE instance started.

Total System Global Area 776646656 bytes
Fixed Size         2217384 bytes
Variable Size       490736216 bytes
Database Buffers     281018368 bytes
Redo Buffers        2674688 bytes
Database mounted.
Database opened.

# This file is used by ORACLE utilities. It is created by root.sh
# and updated by the Database Configuration Assistant when creating
# a database.

# A colon, ':', is used as the field terminator. A new line terminates
# the entry. Lines beginning with a pound sign, '#', are comments.
#
# Entries are of the form:
#  $ORACLE_SID:$ORACLE_HOME:<N|Y>:
#
# The first and second fields are the system identifier and home
# directory of the database respectively. The third filed indicates
# to the dbstart utility that the database should , "Y", or should not,
# "N", be brought up at system boot time.
#
# Multiple entries with the same $ORACLE_SID are not allowed.
#
#
orcl:/home/oracle/app/product/11.2.0/dbhome_1:Y

#!/bin/sh
#
# This script will be executed *after* all the other init scripts.
# You can put your own initialization stuff in here if you don't
# want to do the full Sys V style init stuff.

touch /var/lock/subsys/local
service smb restart
su - oracle -c 'lsnrctl start'
su - oracle -c 'dbstart'
su - oracle -c 'emctl start dbconsole'

# First argument is used to bring up OracleNet Listener
ORACLE_HOME_LISTNER=$ORACLE_HOME