System and File Preparation


Step 1: Download Oracle Database Express Edition.

Step 2: Instructions before install Oracle

  1. Copy the downloaded file and paste it in home directory.

  2. Unzip using the command:

    unzip oracle-xe-11.2.0-1.0.x86_64.rpm.zip

  3. Install required packages using the command:

    sudo apt-get install alien libaio1 unixodbc

  4. Enter into the Disk1 folder using command:

    cd Disk1/

  5. Convert RPM package format to DEB package format (that is used by Ubuntu) using the command:

    sudo alien --scripts -d oracle-xe-11.2.0-1.0.x86_64.rpm

  6. Create the required chkconfig script using the command:

    sudo pico /sbin/chkconfig

    The pico text editor is started and the commands are shown at the bottom of the screen. Now copy and paste the following into the file and save:

    #!/bin/bash
# Oracle 11gR2 XE installer chkconfig hack for Ubuntu
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

  7. Change the permission of the chkconfig file using the command:

    sudo chmod 755 /sbin/chkconfig  

  8. Set kernel parameters. Oracle 11gR2 XE requires additional kernel parameters which you need to set using the command:

    sudo pico /etc/sysctl.d/60-oracle.conf

  9. Copy the following into the file and save:

    # Oracle 11g XE kernel parameters 
fs.file-max=6815744  
net.ipv4.ip_local_port_range=9000 65000  
kernel.sem=250 32000 100 128 
kernel.shmmax=536870912

  10. Verify the change using the command:

    sudo cat /etc/sysctl.d/60-oracle.conf

  11. You should see what you entered earlier. Now load the kernel parameters:

    sudo service procps start

  12. Verify the new parameters are loaded using:

    sudo sysctl -q fs.file-max

    You should see the file-max value that you entered earlier.

  13. Set up /dev/shm mount point for Oracle. Create the following file using the command:

    sudo pico /etc/rc2.d/S01shm_load

  14. Copy the following into the file and save.

    #!/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
*)
    echo error
    exit 1
    ;;

esac

  15. Change the permissions of the file using the command:

    sudo chmod 755 /etc/rc2.d/S01shm_load

  16. Now execute the following commands:

    sudo ln -s /usr/bin/awk /bin/awk 
sudo mkdir /var/lock/subsys 
sudo touch /var/lock/subsys/listener

    Now, Reboot Your System



Install Oracle

Step 3: Install Oracle

  1. Install the oracle DBMS using the command:

    sudo dpkg --install oracle-xe_11.2.0-2_amd64.deb

  2. Configure Oracle using the command:

    sudo /etc/init.d/oracle-xe configure

  3. Setup environment variables by editting your .bashrc file:

    pico ~/.bashrc

  4. Add the following lines to the end of the file:

    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

  5. Load the changes by executing your profile:

    . ~/.profile

  6. Start the Oracle 11gR2 XE:

    sudo service oracle-xe start

  7. Add user YOURUSERNAME to group dba using the command:

    sudo usermod -a -G dba YOURUSERNAME

Step 4: Using the Oracle XE Command Shell

  1. Start the Oracle XE 11gR2 server using the command:

    sudo service oracle-xe start

  2. Start command line shell as the system admin using the command:

    sqlplus sys as sysdba

    Enter the password that you gave while configuring Oracle earlier. You will now be placed in a SQL environment that only understands SQL commands.

  3. Create a regular user account in Oracle using the SQL command:

    create user USERNAME identified by PASSWORD;

    Replace USERNAME and PASSWORD with the username and password of your choice. Please remember this username and password. If you had error executing the above with a message about resetlogs, then execute the following SQL command and try again:

    alter database open resetlogs;

  4. Grant privileges to the user account using the SQL command:

    grant connect, resource to USERNAME;

    Replace USERNAME and PASSWORD with the username and password of your choice. Please remember this username and password.

  5. Exit the sys admin shell using the SQL command:

    exit;

  6. Start the commandline shell as a regular user using the command:

    sqlplus

    Now, you can run sql commands...