Complete removal of Oracle step "Go" under Linux

(1) Turn off Oracle services and background processes
<1> View the installed home directory and environment variables:

     echo $ORACLE _home     | grep ORA

<2> View instance Names

   as SYSDBA       Select  from V$instance;

<3> View the launched Oracle background process

       Ps–ef |grep Ora_

<4> Close Service

Ps–ef |grep Ora_ can see the background process is gone
Lsnrctl Status View Listener state

(2) Stop Oracle's Listener
(3) Delete subdirectories and files under the $oracle_home directory

   cd $ORACLE _home   pwd   /u01/app/oradata/helen

SECURECRT is a Linux tool that is connected under Windows
Xmanager is also connected to Linux tools to support graphics, where we uninstall Oracle by DBCA graphical means Xmanager
DBCA
Back to SecureCRT
(4) Delete the three files under/usr/local/bin: dbhome,oraenv,coraenv

  su root   /usr/local/bin   ll   rm dbhome   RM oraenv   RM coraenv

(5) Delete the two files under/etc: Oratab and Oralnst.loc

   CD/etc   rm-fr oratab
RM-FR Oralnst.loc

(6) Delete the Orclfmap subdirectory of the/OPT directory

   RM–RF Orclfmap

(7) Delete established users and groups Oinstall and DBAs

  su–oracle   | grp ORA   su root or WhoAmI see who   the current user is /u01 Delete all   files /etc/ Pass View user    /etc/group viewing groups

(8) Multiple exit to log back in with root

   Userdel–r Oracle    groupdel oinstall    Groupdel dba

Complete removal of Oracle step "Go" under Linux