I can't install gns3-gui

GNS3-GUI Parrot Security

First from


For Debian Jessie

Add the following lines to your /etc/apt/sources.list:

deb http://ppa.launchpad.net/gns3/ppa/ubuntu trusty main
deb-src http://ppa.launchpad.net/gns3/ppa/ubuntu trusty main

Then i tried to install it by running this commands from


sudo apt-get install dirmngr
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys F88F6D313016330404F710FC9A2FD067A2E3EF7B
sudo apt-get update
sudo apt-get install gns3-gui
└──╼ $sudo apt-get install gns3-server
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 gns3-server : PreDepends: python3.4 but it is not installable or
                           python3.5 but it is not installable
E: Unable to correct problems, you have held broken packages.

There’s a gns3 in the repository, is that not what you seek?

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As I remember, gns3 in the repository is pretty old. You can install latest version of gns3 using pip

1 Like

Can you show me how ?

Thanks i manged to get it right with pip3 install

$sudo gns3
Please install the PyQt5.QtWebSockets module

Then i use
sudo apt install python3-pyqt5.qtwebsockets

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