1.用oracle用户编辑dbstart文件
登入oracle用户，切换到$ORACLE_HOME/bin目录下，修改文件dbstart。
[oracle@ST ~]$ vi /u01/app/oracle/product/11.2.0/dbhome_1/bin/dbstart修改：看下面注释部分进行修改。
LOGMSG="logger -puser.alert -s "
trap 'exit' 1 2 3
# for script tracing
case $ORACLE_TRACE in
T) set -x ;;
esac
# Set path if path not set (if called from /etc/rc)
SAVE_PATH=/bin:/usr/bin:/etc:${PATH} ; export PATH
SAVE_LLP=$LD_LIBRARY_PATH
# First argument is used to bring up Oracle Net Listener
ORACLE_HOME_LISTNER=$ORACLE_HOME --这里原本是$1，这里改成$ORACLE_HOME即可。
if [ ! $ORACLE_HOME_LISTNER ] ; then
echo "ORACLE_HOME_LISTNER is not SET, unable to auto-start Oracle Net Listener"
echo "Usage: $0 ORACLE_HOME"
else
2.用root用户编辑文件oratab和rc.local
参照下面的注释部分进行修改。
[root@ST ~]# vi /etc/oratab
# This file is used by ORACLE utilities. It is created by root.sh
# and updated by either Database Configuration Assistant while creating
# a database or ASM Configuration Assistant while creating ASM instance.
# 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:/u01/app/oracle/product/11.2.0/dbhome_1:Y --这里原本是N，改成Y即可。
[root@ST ~]# vi /etc/rc.d/rc.local
#!/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
--在空白处添加下面两句话。
su oracle -lc "/u01/app/oracle/product/11.2.0/dbhome_1/bin/lsnrctl start"
su oracle -lc /u01/app/oracle/product/11.2.0/dbhome_1/bin/dbstart
所有这些步骤做完了，就配置好了Oracle在Linux下的自启动了。