写个脚本来启动数据库
每次打开Linux总要做写重复的动作，那就是启动监听，启动数据库，查看数据库状态。麻烦
还是写个shell脚本来控制方便些：
在$ORACLE_HOME/bin下有个dbstart脚本可以启动数据库，但是执行之后提示：
Failed to auto-start Oracle Net Listene using /ade/vikrkuma_new/oracle/bin/tnslsnr
我们来查看下dbstart是怎么写的，直接查询查找文件中的报错来自哪里：
/Failed to auto-start Oracle Net
[oracle@localhost bin]$ grep "Failed to auto-start Oracle Net" dbstart
echo "Failed to auto-start Oracle Net Listene using $ORACLE_HOME_LISTNER/bin/tnslsnr"
在这之前有一句：
ORACLE_HOME_LISTNER=/ade/vikrkuma_new/oracle
开来是路径设错了，修改为：
ORACLE_HOME_LISTNER=$ORACLE_HOME
报错重新执行下，没报错，但是数据库却没有起来，修改文件：
vi /etc/oratab
修改为：
orclsid:/home/oracle/oracle/product/10.2.0/db_1:Y
记住，后面为Y
再起，报错：
查看启动日志：
$ORACLE_HOME/startup.log
[oracle@localhost bin]$ cat $ORACLE_HOME/startup.log
/home/oracle/oracle/product/10.2.0/db_1/bin/dbstart: Starting up database "orclsid"
Sat Apr 6 21:58:21 CST 2013
SQL*Plus: Release 10.2.0.1.0 - Production on Sat Apr 6 21:58:21 2013
Copyright (c) 1982, 2005, Oracle. All rights reserved.
SQL> ERROR:
ORA-01031: insufficient privileges
SQL> ORA-01031: insufficient privileges
SQL>
/home/oracle/oracle/product/10.2.0/db_1/bin/dbstart: Database instance "orclsid" warm started.
看来是权限问题，突然想到我之前修改了Oracle的默认认证方式，禁用了操作系统登录，估计在脚本里面使用的是操作系统登录：
一查，果然是这个问题：
修改为：conn sys/lubinsu as sysdba
重启下：
[oracle@localhost bin]$ dbstart
Processing Database instance "orclsid": log file /home/oracle/oracle/product/10.2.0/db_1/startup.log
/home/oracle/oracle/product/10.2.0/db_1/bin/dbstart: Starting up database "orclsid"
Sat Apr 6 22:25:27 CST 2013
SQL*Plus: Release 10.2.0.1.0 - Production on Sat Apr 6 22:25:27 2013
Copyright (c) 1982, 2005, Oracle. All rights reserved.
SQL> Connected to an idle instance.
SQL> ORACLE instance started.
Total System Global Area 285212672 bytes
Fixed Size 1218968 bytes
Variable Size 100664936 bytes
Database Buffers 176160768 bytes
Redo Buffers 7168000 bytes
Database mounted.
Database opened.
SQL> Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
/home/oracle/oracle/product/10.2.0/db_1/bin/dbstart: Database instance "orclsid" warm started.
看来已经起起来了，查看进程是否存在
[oracle@localhost bin]$ ps -ef | grep ora_pmon
oracle 14658 1 0 22:25 ? 00:00:00 ora_pmon_orclsid
oracle 14806 9470 0 22:26 pts/1 00:00:00 grep ora_pmon
NICE
我们继续来写脚本：
#!/bin/bash
#
# chkconfig: 2345 89 20
# description: starts the oracle listener and instance
status() {
pid=`ps -ef | grep ora_pmon | grep -v grep | awk '{print $8}'`
if [ "X$pid" = "X" ]
then
echo "oracle10g is not running."
exit 1
else
echo "oracle10g is running."
exit 0
fi
}
case "$1" in
start)
#startup the listener and instance
echo -n "oracle begin to startup: "
su - oracle -c "lsnrctl start"
su - oracle -c dbstart
echo "oracle10g started"
;;
stop)
# stop listener, apache and database
echo -n "oracle begin to shutdown:"
su - oracle -c "lsnrctl stop"
su - oracle -c dbshut
echo "oracle10g shutdowned"
;;
reload|restart)
$0 stop
$0 start
;;
'status')
status
;;
*)
echo "Usage: ora10g [start|stop|reload|restart]"
exit 1
esac
exit 0
赋给执行权限chmod a+x oracle10g
我们可以通过这个脚本来查看oracle的状态，启动，关闭或者重启数据库，方便许多。
