centos 6.5 oracle开机自启动的环境配置详解
环境:centos 6.5 + oracle 11g
自启动之前问题
虚拟机里的oracle环境，每次重启完系统，用plsql developer连接，先是报错:
无tns监听程序
解决方法是切换到系统的oracle用户，执行lsnrctl start，但是执行之前，因为oracle_home环境变量没有生效，还要是环境变量文件生效，步骤如下:
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[oracle@localhost ~]$ source .bash_profile
[oracle@localhost ~]$ echo $oracle_home
/home/oracle/app/oracle/product/11.2.0/dbhome_1
[oracle@localhost ~]$ lsnrctl start
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启动完成后，再次连接，又报错:
oracle没有启动。启动步骤如下:
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[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.
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配置自启动
下面把上述过程都配置成开机启动。
环境变量生效
可能是因为我的oracle用户不是桌面登录的，是从终端su切换过来的，.bash_profile文件没有运行。我把文件里的内容写入.bashrc文件后，重启就可以了。
tns监听以及oracle服务自启动
编辑: /etc/oratab文件，把最后一行的n改成y
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# 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 $oracle_sid are not allowed.
#
#
orcl:/home/oracle/app/product/11.2.0/dbhome_1:y
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路径可能不同
编辑 /etc/rc.local 文件,增加 最后两行:
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#!/bin/sh
#
# this script will be executed *after* all the other init scripts.
# you can put your own initialization stuff in here if you don't
# want to do the full sys v style init stuff.
touch /var/lock/subsys/local
service smb restart
su - oracle -c 'lsnrctl start'
su - oracle -c 'dbstart'
su - oracle -c 'emctl start dbconsole'
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dbstart是数据库自带的启动脚本，我们只要加到rc.local中让它开机调用就可以了。但是还需要编辑一下它。修改dbstart的oracle_home_listner，使其指向$oracle_home:
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# first argument is used to bring up oraclenet listener
oracle_home_listner=$oracle_home
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重启虚拟机，发现plsql developer可以直接连接上了。
感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！
原文链接：http://blog.csdn.net/pony_maggie/article/details/52874667