Uninstall Oracle Database 11g XE On Ubuntu Server 16.04 LTS

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Uninstall Oracle Database 11g XE on Ubuntu Server 16.04 LTS

Oracle Database 11g XE (11.2.X) on Ubuntu Server 16.04.X LTS (x86-64) Deinstallation Instructions

Circa middle of April 2019

(1) Stop the running Oracle Database 11.2.X XE instance

$ sudo /etc/init.d/oracle-xe stop [ ok ] Stopping oracle-xe (via systemctl): oracle-xe.service.

(2) Uninstall (and purge configuration files) the Oracle Database 11.2.X XE instance and its components

Use the dpkg utility to:

(a) Ensure the oracle-xe package is installed and registered in the system package database (optional)

$ dpkg --get-selections | grep oracle-xe oracle-xe install

(b) Purge (uninstall) the oracle-xe package from the system and unregister it from the system package database

$ sudo dpkg -P oracle-xe (Reading database ... 145312 files and directories currently installed.) Removing oracle-xe (11.2.0-2) ... Purging configuration files for oracle-xe (11.2.0-2) ... dpkg: warning: while removing oracle-xe, directory '/u01/app/oracle/product/11.2.0/xe/lib' not empty so not removed dpkg: warning: while removing oracle-xe, directory '/u01/app/oracle/product/11.2.0/xe/config' not empty so not removed dpkg: warning: while removing oracle-xe, directory '/u01/app/oracle/product/11.2.0/xe/dbs' not empty so not removed dpkg: warning: while removing oracle-xe, directory '/u01/app/oracle/product/11.2.0/xe/network' not empty so not removed Processing triggers for libc-bin (2.23-0ubuntu10) ... Processing triggers for mime-support (3.59ubuntu1) ...

(3) Manually remove remaining directories and files from the system

Notice from the previous command execution output there are a series of directories not removed, which are not actually needed. These directories should also be removed. For that simply delete the /u01 directory recursively:

$ sudo rm -Rf /u01

Remove remaining Oracle Database-related directories and files which are still exist in the system for any reason:

$ sudo rm -Rf /etc/default/oracle-xe \ /etc/oratab \ /tmp/.oracle \ /var/tmp/.oracle \ ~/oradiag_<username> \ ~/.rpmdb

(4) (Optional) Remove the user who acts as a DBA from the dba group

$ sudo gpasswd -d <username> dba Removing user <username> from group dba

Do relogin and check the DBA user is not a DBA anymore:

$ groups <usergroup>

– It previously was looked like the following:

$ groups <usergroup> dba

Happy deliverance from Oracle in Ubuntu ! – Because PostgreSQL will rule the Universe !

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