Install GNS3

Ubuntu-based distributions

Run the following commands in a terminal:

  sudo add-apt-repository ppa:gns3/ppa
  sudo apt-get update
  sudo apt-get install gns3-gui

Debian-based distributions (not tested)

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

Finally, run the following commands in a terminal:

  sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys A2E3EF7B
  sudo apt -get update
  sudo apt-get install gns3-gui