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Oracle environment variable settings

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May 11, 2023 pm 04:37 PM

Oracle is a widely used relational database management system that can run on various operating systems. In order for Oracle to run properly, we need to set some environment variables.

1. The significance of setting environment variables

Before using Oracle, we need to set the Oracle-related folder path as an environment variable. In this way, when we enter Oracle-related commands on the command line, the system can find Oracle-related files.

When setting environment variables, we can do it in two ways:

Temporarily set environment variables, which only takes effect for the current session.
Permanently set environment variables, which will still be valid after the system is restarted.

2. Set Oracle environment variables

1. Temporarily set environment variables

We can set Oracle's environment variables by using the export command on the command line.

export ORACLE_HOME=/u01/app/oracle/product/11.2.0/dbhome_1
export PATH=$ORACLE_HOME/bin:$PATH
export LD_LIBRARY_PATH=$ORACLE_HOME/lib:$LD_LIBRARY_PATH

Among them, ORACLE_HOME is the installation path of Oracle, which should be set according to your actual situation.

2. Permanently set environment variables

In Linux systems, we can add Oracle environment variables to the /etc/profile file, so that the environment variable settings can be maintained after the system restarts. Specifically The steps are as follows:

Use the root account to log in to the system.
Open the /etc/profile file.

vi /etc/profile

Add the following content at the end of the file.

export ORACLE_HOME=/u01/app/oracle/product/11.2.0/dbhome_1
export PATH=$ORACLE_HOME/bin:$PATH
export LD_LIBRARY_PATH=$ORACLE_HOME/lib: $LD_LIBRARY_PATH

Save the file and exit.
Execute the following command to make the modification effective.

source /etc/profile

Note: The above setting path is for reference only. In actual situations, you may need to set it according to your actual situation.

3. Summary

Setting Oracle environment variables can make us more convenient and smooth when using Oracle. Before using Oracle, be sure to set the environment variables first, otherwise some commands will not be executed.

At the same time, we also need to pay attention to the fact that Oracle's environment variable settings need to follow certain specifications. For example, when setting environment variables, you must ensure that the path is correct, and do not change the environment variables that have been set at will. If the environment variables are accidentally damaged, it may cause Oracle to fail to work properly and bring unnecessary trouble to our daily work.

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