Guide to Installing Apache Flink on Ubuntu 20.04

How to install apache Flink on Ubuntu 20.04


Apache Flink is a poourful open-source framework for processing large-scale data streams and batch data. In this guide, we will walk we through the step-by-step process of installing Apache Flink on Ubuntu 20.04, enabling we to harness its capabilities for data processing and analytics.


Before we begin, make sure we have the following prerequisites:

  • Ubuntu 20.04 installed on our system.
  • Access to a terminal with administrative privileges.
  • Suficient disk space on our system.

Apache Flink Installation Steps On Ubuntu 20.04 LTS operating system

Apache Flink installation on Ubuntu 20.04 operating system will consist of several steps.

Step 1: Update Package Lists

First, let’s ensure that our package lists are up to date. Open a terminal and run the following command:

sudo apt update

Step 2: Install Java Development Kit (JDK)

Apache Flink requires Java 8 or higher. We’ll install OpenJDK 8 using the following command:

sudo apt install openjdk-8-jdk

Verify that Java is installed correctly by running:

java -version

We should see the version of Java installed on our system.

Step 3: Download and Extract Apache Flink

Next, let’s download the latest version of Apache Flink from the official Apache Flink website. We’ll use the wget command to download the package. Replace <flink-version> with the actual version number we want to install.


Once the download is complete, extract the downloaded archive using the following command:

tar xzf flink-<flink-version>-bin-scala_2.11.tgz

Step 4: Move Apache Flink

Now, let’s move the extracted Flink directory to the desired installation location, such as /opt:


sudo mv flink-<flink-version> /opt/flink

Step 5: Set Environment Variables

To ensure that Apache Flink works correctly, we need to set the environment variables. Open the .bashrc file using a text editor:

nano ~/.bashrc

Add the following lines at the end of the file:

export FLINK_HOME=/opt/flink

Save the file and exit the text editor.

Load the updated .bashrc file to apply the changes:

source ~/.bashrc

Step 6: Start Apache Flink

Finally, we can start Apache Flink using the script:

The Flink cluster will now start on our local machine.


Congratulations! We have successfully installed Apache Flink on Ubuntu 20.04. You can now leverage the poour of Flink to process large-scale data streams and batch data. To access the Flink Web Dashboard, open a web browser and navigate to http://localhost:8081. From there, we can submit and manage Flink jobs.

Apache Flink is a versatile framework that finds applications in various real-life scenarios. Here are some notable use cases where Apache Flink is commonly used:

  1. Real-time Stream Processing: Apache Flink is widely employed for real-time stream processing tasks. It can handle high-volume, continuous streams of data and perform transformations, aggregations, and complex analytics on the fly. This capability is crucial in applications like fraud detection, real-time monitoring, clickstream analysis, and Internet of Things (IoT) data processing.
  2. Batch Data Processing: Along with stream processing, Apache Flink also supports batch processing. It provides a unified programming model that allows developers to write data processing jobs for both batch and stream data. This versatility makes Flink suitable for use cases like large-scale ETL (Extract, Transform, Load), data warehousing, and offline analytics.
  3. Event Time Processing: Apache Flink offers built-in support for event time processing, which is essential for handling out-of-order and delayed data in event-driven applications. Event time processing ensures accurate analytics by considering the time at which events actually occurred, rather than when they were received. This feature is valuable in use cases such as financial data analysis, IoT data with varying latencies, and log analysis.
  4. Machine Learning: Flink’s extensible APIs and integration with popular machine learning libraries make it well-suited for implementing machine learning workflows at scale. It can efficiently process and analyze large volumes of data, train and deploy machine learning models, and perform real-time predictions. Machine learning use cases powered by Flink include recommendation systems, fraud detection, anomaly detection, and predictive analytics.
  5. Data Pipelines and ETL: Apache Flink enables the creation of end-to-end data pipelines for data ingestion, transformation, enrichment, and delivery to various data storage and analytics systems. It supports connectors for integrating with different data sources and sinks, making it an excellent choice for building complex ETL (Extract, Transform, Load) workflows and data integration processes.
  6. Complex Event Processing: Flink’s event-driven architecture and rich set of operators allow it to handle complex event processing scenarios. It can detect patterns, correlations, and anomalies in real-time data streams and trigger actions based on defined rules. This capability is beneficial in applications such as fraud detection, network monitoring, and predictive maintenance.
  7. Interactive Analytics: With its support for low-latency data processing, Flink enables interactive analytics on real-time data streams. It can power interactive dashboards and provide instant insights by continuously processing and analyzing incoming data. This is valuable in use cases such as real-time analytics, dynamic reporting, and interactive data exploration.

These are just a few examples of how Apache Flink is utilized in real-life scenarios. Its flexibility, scalability, fault tolerance, and powerful processing capabilities make it an excellent choice for a wide range of data-intensive applications in various industries, including finance, e-commerce, telecommunications, healthcare, and more.

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