Linux Redhat 7 Perfect removal/uninstallation of Oracle 11g

One, close Oracle services and background processes
1. Review the installation's home directory and environment variables:

1. Echo $ORACLE _home
2. env | grep ORA

2. View the instance Name

1. Sqlplus/as SYSDBA
2. Select instance_name from V$instance;

3. View the Oracle background process started

ps –ef |grep ora_

4. Close the service

1. Shutdown immediate;
2. Ps–ef |grep ora_//can see the background process is gone
3. Lsnrctl Status//View listener State

5. Stop Oracle's Listener

lsnrctl stop

Ii. Uninstalling Oracle
1. Delete subdirectories and files under the $oracle_home directory

1. CD $ORACLE _home
2. Pwd
3. Cd/u01/app/oradata/helen
4. RM-RF *

2. Delete the three files under/usr/local/bin: dbhome,oraenv,coraenv

1. Su-root
2. Cd/usr/local/bin
3. RM-RF Dbhome
4. RM-RF oraenv
5. RM-RF coraenv

3. Delete two files under/etc: Oratab and Oralnst.loc

1. Cd/etc
2. RM-RF Oratab
3. RM-RF Orainst.loc

4. Delete the Orclfmap subdirectory of the/OPT directory

rm –rf /opt/ORCLfmap

5. Delete established users and groups Oinstall and DBAs

1. Su–oracle
2. ENV | GRP ORA
3. Su Root or WhoAmI see who the current user is
4. RM–RF/U01 Delete all Files
5. Cat/etc/pass Viewing users
6. Cat/etc/group viewing groups

6. Multiple exit exit and re-login with root

1. Userdel–r Oracle
2. Groupdel Oinstall
3. Groupdel DBA

Note: If you need to reinstall, you do not need to hurt Oracle users and groups

Linux Redhat 7 Perfect removal/uninstallation of Oracle 11g