oracle for linux tutorial

Oracle database is a very popular relational database management system that can be used to store, manage and process large-scale data, and is widely used in enterprise-level applications. Oracle Database provides high reliability, security, and scalability, so it is the default database option for many enterprises.

In this tutorial, we will introduce how to install and configure Oracle database on Linux operating system, and demonstrate how to create database, tables and data.

Step 1: Prepare the environment

Before installing the Oracle database, you first need to ensure that your environment meets the following requirements:

• Linux operating system: Oracle support Many Linux distributions. In this tutorial, we will use Oracle Linux version 7.9.
• Confirm Linux User: Confirm that your Linux user has sufficient permissions to be able to install and configure the Oracle database.

• Install dependencies: Before installing the Oracle database, you need to install the following dependencies:

  # yum install -y binutils.x86_64 compat-libcap1.x86_64 gcc.x86_64 gcc-c++.x86_64 glibc.i686 
  glibc.x86_64 glibc-devel.i686 glibc-devel.x86_64 ksh compat-libstdc++-33 libaio.i686 libaio.x86_64 
  libaio-devel.i686 libaio-devel.x86_64 libgcc.i686 libgcc.x86_64 libstdc++.i686 libstdc++.x86_64 
  libstdc++-devel.i686 libstdc++-devel.x86_64 libXi.i686 libXi.x86_64 libXtst.i686 libXtst.x86_64 
  make.x86_64 sysstat.x86_64

Once your environment is ready, you can proceed with the installation and configure the Oracle database.

Step 2: Download and install the Oracle database

The installation program for the Oracle database can be downloaded from the Oracle official website. Before downloading the program, you need to log in to the official website to obtain the download link.

Upload the downloaded installer to the Linux server and unzip the file:

# unzip linuxx64_12201_database.zip

After unzipping, you will see a directory named "database". Enter the directory and run the installer:

# cd database
# ./runInstaller

The installer will start and the "Oracle Universal Installer" window will appear. Follow these steps to start the installation:

• Set the installation console language. After selecting your language, click Next.
• Check system settings. The installer will check the system settings to ensure that all prerequisite software and configurations are functioning properly. After the check is complete, click Next.
• Select the installation type. Select "Install database software" and click "Next".
• Select product language. Select the product language to install and click Next.
• Select the installation location. Select the location where you want to install the Oracle database and click Next.
• Check the installation options. Review your installation options and click Next.
• To install. Click "Install" to start the installation process.
• The installation is complete. Wait for the installer to complete, then click Finish to exit the installer.

Step 3: Configure Oracle Database

After installing the Oracle database, you need to set some configurations to use it. Below are some common configurations and settings.

Create an Oracle user

Before using the Oracle database, you must create an Oracle user for managing the database. You can create a user named "oracle" using the following command:

# groupadd oinstall
# groupadd dba
# useradd -g oinstall -G dba oracle

Set environment variables

You need to set environment variables so that the shell can find the location of the Oracle executable. Edit the user's .bash_profile file to set the environment variables using the following command:

# su - oracle
$ echo "export ORACLE_HOME=/u01/app/oracle/product/12.2.0/dbhome_1" >> .bash_profile
$ echo "export PATH=$ORACLE_HOME/bin:$PATH" >> .bash_profile
$ echo "export LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib" >> .bash_profile
$ source .bash_profile

Create a listener

The Oracle listener enables a database instance to accept connection requests from client applications. Create a listener named "LISTENER" using the following command:

$ netca

In the "Oracle Net Configuration Assistant" window, select "Listener Configuration" and click "Next" to accept the defaults, then select " Add" configures a new listener. Change the name of the listener to "LISTENER", then select "Next" to go to the completion interface and complete it directly.

Create Database

Create a database instance named "orcl" using the following command:

$ dbca

In the "Database Configuration Assistant" window, select "Create Database" and Click Next. Select the Custom Database Creation option and click Next. Enter the following details here:

• Database Identifier: ORCL
• Character Set and Language: Select UTF8 character set and US English language.
• Storage options: Select "File system" as the storage type and "/u01/app/oracle/oradata" as the default location.
• Administrative Options: Select the "Create new administrative user" option and enter your username and password.

Finally, click Next and check your configuration in the Database Configuration window. Then click "Finish" to create the database.

Step 4: Test the database connection

After completing the installation and configuration of the Oracle database, you need to test whether the database can run normally and accept client connections. Start the Oracle database using the following command:

$ sqlplus / as sysdba

This command will start SQLPlus and connect to the running Oracle instance using the sysdba identity. If you are able to log in to the SQLPlus prompt, it means that the Oracle database is successfully installed and running.

Now, you can try to use an Oracle client application (such as SQL Developer) to connect to your Oracle database and use it to manage your data.

Conclusion

In this tutorial, we introduced how to install and configure Oracle database on Linux operating system. We also demonstrated how to create databases, tables, and data, and tested database connections. Oracle Database is a very powerful and popular database management system that can be used to store, manage and process large-scale data. If you are considering using Oracle Database to manage your enterprise application data, this tutorial can serve as a great starting point.

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