Completely remove Oracle__ios under Linux

Taking 9.0.4 as an example
1. Login with Oracle User
If you want to install it again, it's best to do some backup work first.
Includes user login scripts, database automatically launches shutdown scripts, and listener scripts automatically start.
If it's possible to save a script that creates a database,

2. Stop the database using Sql*plus
[oracle@ora920 oracle]$ Sqlplus/nolog
Sql> Connect/as SYSDBA
sql> shutdown [Immediate]
Sql> exit

3. Stop Listener
[oracle@ora920 oracle]$ Lsnrctl Stop

4. Stop HTTP Service
[oracle@ora920 oracle]$ $ORACLE _home/apache/apache/bin/apachectl Stop

5. Use Su or re-login to root (if you want to reinstall you can keep the Oracle users, save the input environment variables)

6. Remove the installation directory
[root@ora920/root]# rm-rf/opt/oracle/

7. Delete the files under/usr/bin
[root@ora920/root]# Rm/usr/bin/dbhome
[root@ora920/root]# rm/usr/bin/oraenv
[root@ora920/root]# rm/usr/bin/coraenv

8. Delete the/etc/oratab
[root@ora920/root]# Rm/etc/oratab

9. Delete the/etc/orainst.loc
[root@ora920/root]# Rm/etc/orainst.loc

10. Remove the Oracle User (to reinstall, you can not delete)
[root@ora920/root]# userdel–r Oracle

11. Delete the user group (to reinstall, you can not delete)
[root@ora920/root]# Groupdel Oinstall
[root@ora920/root]# Groupdel DBA

12. Remove Startup service
[root@ora920/root]# chkconfig--del Dbora