默认的单机oracle数据库中，oracle不会随着操作系统的启动而启动，需要手工启动。下面设置开机自动启动
[oracle@CSICN20RPT01 ]$ 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/11.2.0.4/db_1:Y
Note：这里把N改成Y（no该为yes）,如果没有发现该文件，则在oracle安装目录下寻一脚本root.sh执行，该文件就有了
[root@CSICN20RPT01 etc]# vi /etc/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
route add default gw 192.168.40.1
su - oracle -c 'lsnrctl start'
su - oracle -c 'dbstart'
Note：添加红色部分，启动监听，启动数据库