GNS3 Installation Debian 12

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Install GNS3 from Python3 PyPI and run it in a Python virtual environment

Firstly, install the required Debian packages

  • sudo apt install python3-pip python3-venv python3-pyqt5.qtsvg python3-pyqt5.qtwebsockets

Then create a Python virtual environment

  • python3 -m venv gns3env

Activate the virtual environment

  • source gns3env/bin/activate

Install the required packages from PyPI

  • pip install pyqt5
  • pip install gns3-server
  • pip install gns3-gui

You should now be able to launch the gns3 gui from a shell prompt

(gns3env) $ gns3