centos 6.5 install oracle

CentOS 6.5 is an operating system for servers, and Oracle database is the most popular among enterprise databases. This article will introduce readers to how to install Oracle database on CentOS 6.5.

Step 1: Check the system requirements

Before installing the Oracle database, we need to ensure that our system meets the following requirements:

• CentOS 6.5 has been installed.
• At least 1GB of memory.
• At least 5GB of hard drive space.
• The necessary library files have been installed, such as binutils, compat-libcap1, compat-libstdc-33, gcc, gcc-c, glibc, glibc-devel, libaio, libaio-devel, libgcc, libstdc, libstdc -devel, make, sysstat, etc.

You can use the following command to check whether your system meets this requirement:

# cat /etc/redhat-release
# uname -m
# getconf LONG_BIT
# free -g
# df -h

If your system meets the above requirements, we can proceed to the next step.

Step 2: Download and decompress the Oracle installation file

Before installing the Oracle database, we need to download the corresponding database installation file from the Oracle official website. Please note that you must have an Oracle account to download.

After downloading the installation file, unzip it:

# unzip linux.x64_11gR2_database_1of2.zip
# unzip linux.x64_11gR2_database_2of2.zip

After unzipping, you will get a directory named database, which contains the necessary files to install the Oracle database All files.

Step 3: Configure system parameters

Before installing the Oracle database, we need to make some changes to the system parameters.

Open the /etc/sysctl.conf file and add the following lines:

kernel.shmall = 2097152
kernel.shmmax = 4294967296
kernel.shmmni = 4096
kernel.sem = 250 32000 100 128
fs.file-max = 6815744
net.ipv4.ip_local_port_range = 9000 65500
net.core.rmem_default = 262144
net.core.rmem_max = 4194304
net.core.wmem_default = 262144
net.core.wmem_max = 1048576

After saving and closing the file, run the following command:

# sysctl -p

This command will make the changes take effect.

Step 4: Create Oracle users and groups

Before installing the Oracle database, we need to create a user named oracle and a user named dba group.

Use the following command to create the dba group:

# groupadd dba

Use the following command to create the oracle user and add it to dba In the group:

# useradd -m -g dba oracle

Next, we need to change the password of the oracle user so that we can log in and install the Oracle database:

# passwd oracle

Step 5: Configure the environment Variables

Before installing the Oracle database, we need to configure the environment variables of the oracle user.

Open the ~/.bash_profile file and add the following lines:

export ORACLE_BASE=/u01/app/oracle
export ORACLE_HOME=$ORACLE_BASE/product/11.2.0/dbhome_1
export ORACLE_SID=orcl
export PATH=$PATH:$ORACLE_HOME/bin

After saving and closing the file, run the following command:

# source ~/.bash_profile

This command Will make the environment variables take effect.

Step 6: Install the Oracle database

Now, we are ready to install the Oracle database.

Go to the database directory where you extracted the files and run the runInstaller script:

# cd database
# ./runInstaller

Next, you will see an installation wizard. In the wizard, you need to select the installation type, installation location, etc.

Select the installation type "Enterprise Edition", and leave the others as default.

On the Select Installation Options page, select Create Database.

On the "Installation Options" page, select "Database installation suitable for stand-alone environment".

On the "System Category" page, select "Desktop Category".

On the "Database Configuration" page, enter the following information:

• Global database name: orcl
• Database password: Enter your preferred password
• Check to create a sample database
• Select dba for both permission groups

Click Next to accept the default installation options. Just click to install.

The installation process will take some time, please be patient.

Step 7: Complete the installation

After the installation is complete, you need to configure the Oracle database.

Open a terminal and switch to the oracle user:

# su - oracle

Then, run the following command:

# cd $ORACLE_HOME/bin
# ./dbca

In the "Create Database" wizard, you need Specify the database name, database character set, data file location, listener configuration, etc.

After completing the wizard, your Oracle database has been installed and configured successfully.

Conclusion

Installing an Oracle database can be a bit complicated, but following the steps above can make the entire process simple. Once successfully installed, your CentOS 6.5 system is ready to run one of the most popular enterprise-level databases.

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