参考 http://soulful.blog.51cto.com/468033/378995
1.停止数据库
sqlplus / as sysdba SQL> shutdown immediate SQL> exit
2.停止Listener
lsnrctl stop
3.停止Oracle服务
service oracledb stop
4.删除安装的目录
rm -rf /u01/app/oracle/ rm -rf /usr/local/bin/dbhome rm -rf /usr/local/bin/oraenv rm -rf /usr/local/bin/coraenv rm -rf /etc/oratab rm -rf /etc/oraInst.loc
5.删除用户如果需要
6.删除启动服务
chkconfig --del oracledb
7.删除自启动脚本 /etc/init.d/oracledb 如果需要