How to set Zookeeper's environment variables on CentOS

You can configure ZooKeeper environment variables in CentOS system in two ways:

Method 1: Global configuration (affects all users)

This method modifies the /etc/profile file so that all users can access ZooKeeper environment variables.

1. Open the terminal and use root permissions to edit the configuration file:

    sudo vi /etc/profile

2. Add the following at the end of the file and replace /opt/zookeeper-3.7.0 with your actual installation path of ZooKeeper:

    export ZOOKEEPER_HOME=/opt/zookeeper-3.7.0
   export PATH=$PATH:$ZOOKEEPER_HOME/bin

3. Save and close the file. (In the vi editor, press Esc key, then enter :wq and press Enter.)

4. Make the changes take effect:

    source /etc/profile

Method 2: User-level configuration (only affects the current user)

This method modifys the ~/.bashrc file and is only effective for the currently logged-in user.

1. Open the terminal and edit the ~/.bashrc file:

    vi ~/.bashrc

2. Add the following at the end of the file, and replace /opt/zookeeper-3.7.0 with your actual installation path of ZooKeeper:

    export ZOOKEEPER_HOME=/opt/zookeeper-3.7.0
   export PATH=$PATH:$ZOOKEEPER_HOME/bin

3. Save and close the file. (In the vi editor, press Esc key, then enter :wq and press Enter.)

4. Make the changes take effect:

    source ~/.bashrc

Verify configuration

Regardless of the method used, you can verify that the ZooKeeper environment variable is set correctly by:

 echo $ZOOKEEPER_HOME
echo $PATH

If the output shows the correct ZooKeeper installation path, the configuration is successful.

Important tips:

• Be sure to replace /opt/zookeeper-3.7.0 with your actual ZooKeeper installation directory.
• Global configuration (Method 1) is suitable for all users who need to access ZooKeeper. User-level configuration (Method 2) is only valid for the current user and is more suitable for personal use or testing environments.

Through the above steps, you can successfully configure ZooKeeper environment variables on your CentOS system.

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