To launch GNS3 using the command line, just run the below command: $ gns3 You can launch GNS3 either using the command line Terminal application or the graphical interface. The output below verifies that GNS3 is installed on our system.ĥ.

To verify GNS3 installation on your system, use the below command: $ gns3 -version

Now GNS3 software will be installed on your Ubuntu machine.Ĥ. Again select Yes using the Tab key and then hit Enter.

Then it will ask if you want to permit non-superusers to capture packets. Select Yes using the Tab key and then hit Enter. Now a window will show up asking if you would like to permit non-superusers to run GNS3. Along with GNS3, some other software dependencies will also be installed which are required to run GNS3. Now the installation of GNS3 software will be started on your system. Then install GNS3 software using the below command: $ sudo apt install gns3-gui gns3-server Now your local repository will be updated with the GNS3 PPA.ģ. The command to do so is as follows: $ sudo apt update After running the above command, update the local repository index. If you do not want to proceed, hit Ctrl-c to cancel it.Ģ. Once this step is completed, move on to the next step. Then again, hit Enter key to continue the procedure. Type the sudo password and hit Enter key. Use the command below in Terminal to add the GNS3 PPA to your system repositories: $ sudo add-apt-repository ppa:gns3/ppaĪfter running the above command, you will be prompted to input the sudo password. Then we will install it using the Ubuntu package manager.ġ. To install it, you will need to add its PPA repository to your Ubuntu system. GNS3 is not available in the default repositories of Ubuntu OS. In this post, we are going to explain how to install the GNS3 network simulator on Ubuntu 20.04 LTS. GNS3 can be installed and used on Linux, Mac, and Windows OS. With GNS3, you can create a small topology ranging from few devices on your system to those having multiple devices hosted on different servers. It also helps you to practice for certification exams like CCNA, CCNP, CCIE, etc. GNS3 is a free and open-source software network simulator to test and verify real-world deployments without the need for actual network hardware.

How to use gns3 simulator