Oracle XE ( 11.2.0 ) Database Configuration failed on Ubunto 14 and 16 - database

Question

I am facing Error while configuring Oracle XE after installation.
I Follow this Tutorial
https://askubuntu.com/questions/566734/how-to-install-oracle-11gr2-on-ubuntu-14-04
When I run this statement for database Configuration.
/etc/init.d/oracle-xe configure
I face this Error after input ports and password
Do you want Oracle Database 11g Express Edition to be started on boot (y/n) [y]:y
Starting Oracle Net Listener...Done
Configuring database...
**Database Configuration failed. Look into /u01/app/oracle/product/11.2.0/xe/config/log for details**
I guess it maybe memory Target size issue.
I Tried this
nano /u01/app/oracle/product/11.2.0/xe/config/scripts/init.ora
comment # memory_target=100663296
but It won't work work for me.
Error Log.
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

Answer 1

The best would be to start from the beginning.
Step 1 - Installation of SSH server
sudo apt install openssh-server
Step 2 - Execute the following commands (pre-requisite packages)
sudo apt-get install alien libaio1 unixodbc vim
Step 3 - Download the Oracle 11g express edition setup file from Oracle website http://www.oracle.com/technetwork/database/database-technologies/express-edition/downloads/index.html . Then go to folder where you have downloaded the setup file (rpm) and convert it to debian type (deb):
sudo alien --scripts -d oracle-xe-11.2.0-1.0.x86_64.rpm
Step 4 - Execute the pre-requisites,
Create a special chkconfig script:
sudo vim /sbin/chkconfig
and add following into the file:
#!/bin/bash
file=/etc/init.d/oracle-xe
if [[ ! `tail -n1 $file | grep INIT` ]]; then
echo >> $file
echo '### BEGIN INIT INFO' >> $file
echo '# Provides: OracleXE' >> $file
echo '# Required-Start: $remote_fs $syslog' >> $file
echo '# Required-Stop: $remote_fs $syslog' >> $file
echo '# Default-Start: 2 3 4 5' >> $file
echo '# Default-Stop: 0 1 6' >> $file
echo '# Short-Description: Oracle 11g Express Edition' >> $file
echo '### END INIT INFO' >> $file
fi
update-rc.d oracle-xe defaults 80 01
Save the above file and provide appropriate permissions
sudo chmod 755 /sbin/chkconfig
Execute the following commands:
free -m
sudo ln -s /usr/bin/awk /bin/awk
mkdir /var/lock/subsys
touch /var/lock/subsys/listener
Execute the below which prevents oracle installation errors. It is weird but helped in my case. Ignore errors that will appear.
sudo -s
umount /dev/shm
sudo rm -rf /dev/shm
sudo mkdir /dev/shm
mount --move /run/shm /dev/shm
sudo mount -t tmpfs shmfs -o size=2048m /dev/shm
Step 5 - Create the below file,
sudo vim /etc/rc2.d/S01shm_load
Copy content below into the opened file:
#!/bin/sh case "$1"
in start) mkdir /var/lock/subsys 2>/dev/null
touch /var/lock/subsys/listener
rm /dev/shm 2>/dev/null
mkdir /dev/shm 2>/dev/null
mount -t tmpfs shmfs -o size=2048m /dev/shm ;;
*) echo error
exit 1 ;;
esac
Execute the following command
sudo chmod 755 /etc/rc2.d/S01shm_load
Step 6 - Restart the machine.
Step 7 - Install Oracle 11gR2 XE. Go to the directory where you created the ubuntu package file and enter following commands (not as root user),
sudo dpkg --install oracle-xe_11.2.0-2_amd64.deb
sudo /etc/init.d/oracle-xe configure
Enter the following configuration information:
Valid HTTP port for the Oracle Application Express (the default is 8080, use 7070)
Valid port for the Oracle database listener (the default is 1521)
Password for the SYS and SYSTEM administrative user accounts
Confirm password for SYS and SYSTEM administrative user accounts
Whether you want the database to start automatically when the computer starts, Y
Step 8 - Before you start using Oracle 11gR2 XE you have to set-up few things more.
Change to users home directory (type cd)
Open bashrc using the command
vim .bashrc
Add following lines to .bashrc :
export ORACLE_HOME=/u01/app/oracle/product/11.2.0/xe
export ORACLE_SID=XE
export NLS_LANG=`$ORACLE_HOME/bin/nls_lang.sh`
export ORACLE_BASE=/u01/app/oracle
export LD_LIBRARY_PATH=$ORACLE_HOME/lib:$LD_LIBRARY_PATH
export PATH=$ORACLE_HOME/bin:$PATH
Execute .profile to load the changes:
. ./.profile
Open root bash using
sudo vim /root/.bashrc
and copy the same contents at the end of that file
Step 9 - Restart the appliance. Oracle should have been started now
Step 10 - Execute the following command to enter SQL prompt
sqlplus sys as sysdba