[p=24, null, left]1.使用SQL*PLUS停止数据库
[oracle@dg2 ~]$ sqlplus logSQL> connect / as sysdbaSQL> shutdown immediateSQL> shutdown immediateDatabase closed.Database dismounted.ORACLE instance shut down.SQL> exit[p=24, null, left]2.停止监听listener
[oracle@dg2 ~]$ lsnrctl stopLSNRCTL for Linux: Version 11.2.0.4.0 - Production on 23-DEC-2016 14:44:52Copyright (c) 1991, 2013, Oracle. All rights reserved.Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=dg1)(PORT=1521)))The command completed successfully[p=24, null, left]3.停止HTTP服务
[root@dg2 ~]# service httpd stopStopping httpd: [ OK ][root@dg2 ~]#[p=24, null, left]4.用su或者重新登录到root(如果重新安装可以保留oracle用户)

5.将安装目录删除
[root@dg2 ~]# rm -rf /u01/app/oracle/[root@dg2 ~]# rm -rf /u01/app/oraInventory/[p=24, null, left]6.将/usr/bin下的文件删除
[root@dg2 ~]# rm -rf /usr/local/bin/dbhome[root@dg2 ~]# rm -rf /usr/local/bin/oraenv[root@dg2 ~]# rm -rf /usr/local/bin/coraenv[p=24, null, left]7.将/etc/oratab删除
[root@dg2 ~]# rm /etc/oratab[p=24, null, left]8.将/etc/oraInst.loc删除
[root@dg2 ~]# rm /etc/oraInst.loc[p=24, null, left]9.将oracle用户删除(若要重新安装,可以不删除)
[root@dg2 ~]# userdel –r oracle[p=24, null, left]10.将用户组删除(若要重新安装,可以不删除)
[root@dg2 ~]# groupdel oinstall[root@dg2 ~]# groupdel dba[p=24, null, left]11.将启动服务删除

[root@dg2 ~]# chkconfig[p=24, null, left]到此为止重启后，Linux系统下的Oracle数据库已完全删除了！