ORA-01034: ORACLE error not available when configuring Oracle ApEx

I want to configure Oracle Application Express on Ubuntu system and when I sudo / etc / init.d / oracle-xe configure it (I added oracle to localhost in etc / hosts) it still doesn't work. These are my log files:

cloneDBCreation.log

 Create controlfile reuse set database "XE"
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 


BEGIN dbms_backup_restore.zerodbid(0); END;

*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 


ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
Linux-x86_64 Error: 2: No such file or directory
ORA-00845: MEMORY_TARGET not supported on this system
Create controlfile reuse set database "XE"
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 


alter system enable restricted session
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 


alter database "XE" open resetlogs
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 


alter database rename global_name to "XE"
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 


alter system switch logfile
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 


alter system checkpoint
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 


alter database drop logfile group 3
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 


ALTER TABLESPACE TEMP ADD TEMPFILE '/u01/app/oracle/oradata/XE/temp.dbf' SIZE 20480K REUSE AUTOEXTEND ON NEXT 640K MAXSIZE UNLIMITED
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 


select tablespace_name from dba_tablespaces where tablespace_name='USERS'
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 


select sid, program, serial#, username from v$session
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 


alter user sys identified by "oracle"
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 


alter user system identified by "oracle"
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 


alter system disable restricted session
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 `

CloneRmanRestore.log

    ORA-00845: MEMORY_TARGET not supported on this system
select TO_CHAR(systimestamp,'YYYYMMDD HH:MI:SS') from dual
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 


declare
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 


select TO_CHAR(systimestamp,'YYYYMMDD HH:MI:SS') from dual
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 

postDBCreation.log

    begin
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 



File created.

ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
Linux-x86_64 Error: 2: No such file or directory
ORA-00845: MEMORY_TARGET not supported on this system
select 'utl_recomp_begin: ' || to_char(sysdate, 'HH:MI:SS') from dual
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 


BEGIN utl_recomp.recomp_serial(); END;

*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 


select 'utl_recomp_end: ' || to_char(sysdate, 'HH:MI:SS') from dual
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 `

postScripts.log

    CREATE OR REPLACE LIBRARY dbms_sumadv_lib AS '/u01/app/oracle/product/11.2.0/xe/lib/libqsmashr.so';
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 


BEGIN dbms_datapump_utl.replace_default_dir; END;

*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 


commit
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 


create or replace directory XMLDIR as '/u01/app/oracle/product/11.2.0/xe/rdbms/xml'
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 


DROP DIRECTORY ORACLE_OCM_CONFIG_DIR
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 


DROP DIRECTORY ADMIN_DIR
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 


DROP DIRECTORY WORK_DIR
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 


BEGIN dbms_swrf_internal.cleanup_database(cleanup_local => FALSE); END;

*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 


commit
*
ERROR at line 1:
ORA-01034: ORACLE not available 
Process ID: 0 
Session ID: 0 Serial number: 0 

      

        
        
        
      

    

this is my localhost:

127.0.0.1 localhost.localdomain localhost LatitudeE7240

:: 1 LatitudeE7240 localhost6.localdomain6 localhost6

127.0.1.1 LatitudeE7240

127.0.0.1 localhost LatitudeE7240