Manually uninstall Oracle databases on Linux

Manually uninstall the Oracle Database System Environment on Linux: Red Hat Enterprise Linux Server release 5.5 (Tikanga) Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 steps are as follows: 1. stop all Oracle processes $ sqlplus/as sysdba // for asm instance $ sqlplus/as sysasm SQL> shutdonw immediate $ lsnrctl stop 2. delete the Oracle installation directory # rm-rf/u01/app 3. delete related users and user groups # userdel-r oracle # groupdel oinstall # groupdel dba # groupdel users // for asm instance # userdel-r grid # groupdel asmadmin # groupdel asmdba # groupdel asmoper 4. delete the configuration file # rm-rf/etc/oratab # rm-rf/etc/oraInst. loc # rm-rf/usr/local/bin/dbhome # rm-rf/usr/local/bin/oraenv # rm-rf/usr/local/bin/coraenv // grid RAC # rm-rf/etc/oracle # rm-rf/etc/init. d/init. ohasd