Ns3 Installation in Ubuntu 20.04
For your reference, we have highlighted the process of ns3 installation in Ubuntu 20.04 with all the required steps.
Phase: I
The following commands are implemented for the installation of the required libraries of Ns3 in the Ubuntu terminal window.
sudo apt update
sudo apt install g++ python3 python3-dev pkg-config sqlite3 cmake python3-setuptools git qtbase5-dev qtchooser qt5-qmake qtbase5-dev-tools gir1.2-goocanvas-2.0 python3-gi python3-gi-cairo python3-pygraphviz gir1.2-gtk-3.0 ipython3 openmpi-bin openmpi-common openmpi-doc libopenmpi-dev autoconf cvs bzr unrar gsl-bin libgsl-dev libgslcblas0 wireshark tcpdump sqlite sqlite3 libsqlite3-dev libxml2 libxml2-dev libc6-dev libc6-dev-i386 libclang-dev llvm-dev automake python3-pip libxml2 libxml2-dev libboost-all-dev
Phase: II
Then, we have to download the packages based on ns-allinone-3.36.1 from the website namely, nsnam.org.

Phase: III
Following that, we have to install the ns-allinone-3.36.1 through opening the folder and implementing the commands.
cd ns-allinone-3.36.1/
sudo ./build.py –enable-examples –enable-tests

Phase: IV
When we installed the ns-allinone-3.36.1 packages, then we have to run the simulation. For instance, we have highlighted the following command.
cd ns-3.36.1/
./ns3 run hello-simulator

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