Setup Oracle in Ubuntu

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

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…

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Cara Membuat Koneksi Database MySQL di PHP

Hai ! Disini saya akan berbagi cara membuat koneksi database MySql di PHP dengan satu koneksi atau banyak koneksi dalam satu applikasi.

Sebelumnya saya akan memberi contoh membuat dengan satu koneksi.

//koneksi ke server

$connect = mysql_connect(“host”,”user”,”password”) or die(“can’t connect server”);

//memilih database dari server

$db = mysql_select_db(“database”) or die(“can’t get database”);

Dengan menggunakan code diatas Anda sudah bisa melakukan koneksi dengan database MySql

$connect = mysql_connect(“host”,”user”,”password”) or die(“can’t connect server”);

code untuk login mengakses server database, jika gagal mengakses maka akan muncul pesan “can’t connect database”.

$db = mysql_select_db(“database”) or die(“can’t get database”);

code untuk memilih database, jika gagal maka akan muncul pesan “can’t get database”.

Dengan koneksi diatas Anda bisa membuat CRUD (Create, Read, Update, Delete) dengan satu database, tapi jika Anda membuat satu aplikasi ada beberapa database berikut caranya :

//koneksi pertama

$connect1 = mysql_connect(“host1”,”user1”,”password1”) or die(“can’t connect server1”);

$db1 = mysql_select_db(“database1”,$connect1) or die(“can’t get database1”);

//koneksi kedua

$connect2 = mysql_connect(“host2”,”user2”,”password2”) or die(“can’t connect server2”);

$db = mysql_select_db(“database2”,$connect2) or die(“can’t get database2”);

//jika server sama tapi database beda bisa menggunakan koneksi sebelumnya

$db = mysql_select_db(“database3”,$connect1) or die(“can’t get database3”);

Dengan banyak koneksi Anda juga bisa membuar CRUD (Create, Read, Update, Delete) dengan banyak database dalam satu Applikasi.

Cara Membuat Program atau Software (how to make software)

Cara Membuat Software
Gambar Program

Sebelum saya memaparkan cara membuat software terlebih dahulu apasih software itu ?

untuk diskripsi apa itu software saya mengambil dari beberapa sumber diantaranya

software adalah istilah umum untuk data yang diformat dan disimpan secara digital, termasuk program komputer, dokumentasinya, dan berbagai informasi yang bisa dibaca dan ditulis oleh komputer. Dengan kata lain, bagian sistem komputer yang tidak berwujud. Istilah ini menonjolkan perbedaan dengan perangkat keras komputer (id.wikipedia.com)

software adalah sebuah perangkat yang menghubungkan suatu komputer dengan pengguna atau bisa dikatakan sebagai perangkat lunak yang umumnya digunakan untuk mengkontrol perangkat keras atau bisa juga digunakan untuk menghasilkan data informasi (konteseoblog.blogspot.com) Continue reading “Cara Membuat Program atau Software (how to make software)”