CentOS Offload Oracle 11gR2 (x64)

Environment

OS: CentOS 7.4; hosts: L134; IP: 192.168.1.134  Oracle安装文件目录：/opt/oracle_install  ORACLE_BASE：/data/app/oracle  ORACLE_HOME: /data/app/oracle/product/11.2.0/db_1  oraInventory: /data/app/oraInventory  Oracle数据目录：/data/app/oradata/  

Method 1: Use Oracle's own deinstall offload

Then follow the prompts step-by-step operation. The final step is to confirm the operation, select Y, and enter.

Do you want to continue (y - yes, n - no)? [n]: y

Finally, you need to delete the/etc/orainst.loc file as root.
I think method 2 removal is more convenient and more thorough.

Method 2: Manually delete the relevant files and directories

1. Close an instance

sqlplus / as sysdbaSQL> shutdown immediate

1. Close Listener

   lsnrctl stop

2. Remove the installation directory

   su -rm -rf /data/app/oracle/ /data/app/oraInventory/ /data/app/oradata/

3. Delete the relevant files under/usr/bin with root permission. Next week

4. Delete/etc/oratab

   rm -f /etc/oratab

5. Delete

   rm -f /etc/oraInst.loc

6. Delete Oracle Users and user groups (if necessary)

   userdel -r oraclegroupdel oinstallgroupdel dbagroupdel oper

7. Remove startup service

   chkconfig --del oracle

Extended

Oracle's own Deinstall uninstall tips and log information

[[email protected]/data/oracle/11g2/deinstall]$./deinstall Checking for required files and bootstrapping ... Please wait ... Location of logs/tmp/deinstall2018-03-08_08-53-24-am/logs/############ ORACLE Deinstall & deconfig TOOL START ##### ############################### Check operation START ####################### #Install Check Configuration Startchecking for existence of the Oracle home location/data/app/oracle/product/11.2.0/db_1oracle home type selected for De-install is:sidboracle Base selected for De-install are:/data/app/oraclechecking for existence in central inventory loc Ation/data/app/orainventoryinstall Check configuration endnetwork Configuration Check config startnetwork De-configuration trace File Location:/tmp/deinstall2018-03-08_08-53-24-am/logs/netdc_ Check1471463216126639250.logspecify All Instance listeners is de-configured [Listener]:network Configu Ration check config enddatabase check Configuration startdatabase de-configuration traCe file location:/tmp/deinstall2018-03-08_08-53-24-am/logs/databasedc_check5326208000777792237.loguse comma as Separator when specifying list of values as inputspecify the list of database names that is configured in this Oracle hom e [Orclyz]: ###### for Database ' Orclyz ' ##### #Single Instance databasethe Diagnostic Destination location of the database :/data/app/oracle/diag/rdbms/orclyzstorage type used by the Database:fsdatabase file location:/data/app/oracle/ Oradata/orclyz,/data/app/oracle/flash_recovery_area/orclyzflash Recovery Area Location:/data/app/oracle/flash_ Recovery_area/orclyzdatabase spfile Location:/data/app/oracle/product/11.2.0/db_1/dbs/spfileorclyz.orathe details of database (s) Orclyz has been discovered automatically. Does still want to modify the details of Orclyz database (s)? [n]: Database Check configuration endenterprise Manager configuration Assistant startemca de-configuration trace File Loca tion:/tmp/deinstall2018-03-08_08-53-24-am/logs/emcadc_check.Log Checking configuration for database orclyzenterprise Manager configuration Assistant endoracle Configuration Manager C Heck startocm Check log file location:/tmp/deinstall2018-03-08_08-53-24-am/logs//ocm_check5456.logoracle Configuration Manager Check end######################### check operation END ######################################## ######## CHECK Operation SUMMARY ###################### #Oracle Home selected for De-install are:/data/app/oracle/product /11.2.0/db_1inventory location where the Oracle home registered are:/data/app/orainventoryfollowing single Instance Liste NER (s) would be is de-configured:listenerthe following databases were selected for De-configuration:orclyzdatabase unique n Ame:orclyzstorage Used:fsno Enterprise Manager configuration to being updated for any database (s) No Enterprise Manager as M targets to Updateno Enterprise Manager listener targets to migratechecking the config status for Ccroracle Home exists W ITH CCR directory, but CCR isn't CONFIGUREDCCR Check is Finisheddo want to continue (Y-yes, n-no)? [n]: YA Log of this session would be written to: '/tmp/deinstall2018-03-08_08-53-24-am/logs/deinstall_deconfig2018-03-08_ 08-53-33-am.out ' Any error messages from this session'll be written to: '/tmp/deinstall2018-03-08_08-53-24-am/logs/ Deinstall_deconfig2018-03-08_08-53-33-am.err ' ######################## clean operation START ###################### # #Enterprise Manager Configuration Assistant startemca de-configuration trace file location:/tmp/deinstall2018-03-08_ 08-53-24-am/logs/emcadc_clean.log Updating Enterprise Manager ASM targets (if any) Updating Enterprise Manager Listener Ta Rgets (if any) Enterprise Manager Configuration Assistant enddatabase de-configuration trace file location:/tmp/deinstall 2018-03-08_08-53-24-am/logs/databasedc_clean1081110075195191916.logdatabase Clean Configuration START orclyzThis Operation may take few minutes. Database Clean configuration END orclyznetwork Configuration clean config StartnetworK de-configuration trace File location:/tmp/deinstall2018-03-08_08-53-24-am/logs/netdc_    Clean1072295666521765217.logde-configuring single Instance Listener (s): Listenerde-configuring Listener:listener    Stopping Listener:listener Listener stopped successfully. Deleting Listener:listener Listener deleted successfully. Listener de-configured successfully. De-configuring naming Methods configuration file ... Naming Methods configuration file de-configured successfully. de-configuring Backup Files ... Backup files de-configured successfully. The network configuration has a been cleaned up successfully. Network Configuration clean config endoracle configuration Manager clean startocm clean log file location:/tmp/deinstall 2018-03-08_08-53-24-am/logs//ocm_clean5456.logoracle Configuration Manager Clean endoracle Universal Installer Clean Startdetach Oracle Home '/data/app/oracle/product/11.2.0/db_1 ' from the central inventory on the local node:donedelete D Irectory '/data/app/oracle/prodUct/11.2.0/db_1 ' on the local node:donedelete directory '/data/app/orainventory ' on the local Node:donedelete director Y '/data/app/oracle ' on the local node:doneoracle Universal Installer cleanup was successful. Oracle Universal Installer Clean endoracle Install clean startclean install operation removing temporary directory '/tmp/i Nstall ' on node ' POSTALDATADG ' Oracle install clean end######################### clean Operation END #################### ############################ clean Operation SUMMARY ###################### #Successfully de-configured the following Database instances:orclyzfollowing single Instance listener (s) were de-configured successfully:listenercleaning the con Fig for Ccras CCR are not configured, so skipping the cleaning of CCR CONFIGURATIONCCR Clean is finishedsuccessfully detach Ed Oracle home '/data/app/oracle/product/11.2.0/db_1 ' from the central inventory on the local node. Successfully deleted directory '/data/app/oracle/product/11.2.0/db_1 ' on the LocaL node. Successfully deleted directory '/data/app/orainventory ' on the local node. Successfully deleted directory '/data/app/oracle ' on the local node. Oracle Universal Installer Cleanup was successful. Run ' Rm-rf/etc/orainst.loc ' as root on node (s) ' POSTALDATADG ' at the end of the session. Oracle install successfully cleaned up the temporary directories.#################################################### ################################ ORACLE deinstall & deconfig TOOL END #############

CentOS Offload Oracle 11gR2 (x64)