NS2 install script

#! /bin/bash
# https://drive.google.com/file/d/0B7S255p3kFXNVVlxR0ZNRGVORjQ/view?usp=sharing
# untar the file in the same folder
tar -zxvf ns-allinone-2.35_gcc5.tar.gz --strip-components 1
#installing necessary libraries
sudo echo "deb http://in.archive.ubuntu.com/ubuntu/ xenial main" >> /etc/apt/sources.list
sudo echo "deb http://in.archive.ubuntu.com/ubuntu/ xenial universe" >> /etc/apt/sources.list
sudo apt update
sudo apt install -y gcc-4.8 g++-4.8
sudo apt install -y build-essential autoconf wget
sudo apt install -y perl libxt-dev libx11-dev libxmu-dev sgb
export CC=gcc-4.8 CXX=g++-4.8 && ./install
cd ns-2.35/ && sudo make install
cd ../nam-1.15/ && sudo make install
#x-graph
cd ../xgraph-12.2 && ./configure
sudo automake --add-missing
sudo make
sudo make install
#gt-itm
cd ../gt-itm/src
sudo ln -s /usr/lib/libgb.a  ../lib
make
#sgb
cd ../sgb2ns
make all

#final step
cd ../bin
sudo cp {edriver,itm,sgb2alt,sgb2comns,sgb2hierns,sgb2ns} /usr/local/bin

#optional
#cd ns-2.35 && ./validate