Welcome to the DejaCode installation guide! This guide explains how to install DejaCode on various platforms. Please follow the instructions carefully for a smooth installation experience.

The recommended DejaCode installation method is to Run with Docker, which is the easiest and ensures all features work with minimal configuration. This installation works on all operating systems.

Alternatively, if you prefer, you can install DejaCode locally as a development server with some limitations. In this case, you may refer to the Local development installation section for more details.

Run with Docker#

1. Get Docker#

Start by downloading and installing Docker on your platform. Refer to Docker’s documentation for the best installation path for your system: Get Docker.

2. Build the image#

DejaCode comes with the necessary Dockerfile and docker-compose.yml files to create the Docker images and to manage the services (database, cache, webserver).


For Windows users, before cloning the repository, ensure that your git autocrlf configuration is set to false:

git config --global core.autocrlf false

Clone the DejaCode repository#

Open your terminal and clone the DejaCode repo with the following command:

git clone --depth=1

Build the Docker image#

Create an environment file, and build the Docker image with:

cd dejacode && make envfile
docker compose build

3. Run the app#

To run the DejaCode images as containers, use the following command:

docker compose up -d

4. Create an application user#

To create a superuser for the application, use the following command:

make createsuperuser

Follow the prompt instructions, providing the required information:

  • Username: Choose a unique username.

  • Email Address: Provide a valid email address.

  • Strong Password: Create a password following security guidelines.

Use these credentials to access the application.


Congratulations, you are now ready to use DejaCode.

Open a web browser and visit http://localhost/ to access the web UI.

You can sign-in with your user credentials generated above.

You can move onto the Tutorials section starting with the Tutorial 1 - Your first Product.


DejaCode will utilize all available CPUs according to your Docker configuration, ensuring faster processing.

Make sure to allocate enough memory to support each CPU process.

A good rule of thumb is to allocate 1 GB of memory per CPU. For example, with Docker configured for 8 CPUs, allocate a minimum of 8 GB of memory.

5. Dataspace setup and AboutCode integrations#

Upon the initialization of the DejaCode application, the nexB reference Dataspace is created with a default set of data, including license and organization libraries.

Additionally, AboutCode integrations are pre-configured to connect to public instances of the following AboutCode applications:


In the scenario of deploying DejaCode as an enterprise service within your organization, it is strongly recommended to review these configurations. Consideration should be given to running your own instances of these applications to ensure that sensitive or private data is not inadvertently submitted to public services. This strategic approach helps to safeguard organizational data and privacy during package scanning and vulnerability assessments.

Hardware requirements#

The minimum hardware/system requirements for running DejaCode as an enterprise server are:




Modern X86 64 bit Multi Core, with at least 4 physical cores


64 GB or more (ECC preferred)


2 * 500GB SDD in RAID mirror setup (enterprise disk preferred)


Ubuntu 22.04 LTS 64-bit server clean installation

Local development installation#


This section is designed for those interested in actively contributing to the development and enhancement of DejaCode. After setting up DejaCode, please refer to our Contributing chapter for comprehensive instructions on submitting code changes.

Supported Platforms#

DejaCode has been tested and is supported on the following operating systems:

  1. Debian-based Linux distributions

  2. macOS 10.14 and up


On Windows DejaCode can only be Run with Docker.

Pre-installation Checklist#

Before you install DejaCode, make sure you have the following prerequisites:

  1. Python: versions 3.10 found at

  2. Git: most recent release available at

  3. PostgreSQL: release 16 or later found at or on macOS

Clone and Configure#

  1. Clone the DejaCode GitHub repository:

    git clone && cd dejacode
  2. Install the dependencies:

    make dev
  3. Create an environment file:

    make envfile


PostgreSQL is the preferred database backend. To set up the database user, database, and table, run:

make postgresdb


You can validate your DejaCode installation by running the test suite:

make test

Run the App#

Start the local web server using:

make run

Then, open your web browser and visit http://localhost:8000/ to access the web application.


This setup is not suitable for deployments and is only supported for local development. It is highly recommended to use the Run with Docker setup to ensure the availability of all the features.