Starting with the video,

 

The commands used in this video below,

before starting with the installation , Please confirm that you have Python 3.3 or more using this command   python3 -v if not please download and install it either by visiting python’s website or by using the below command

sudo apt-get install python3.4.3

also make sure that gcc is installed using

sudo apt-get install gcc

GNS3 GUI – Part1 :

sudo apt-get install python3-setuptools
sudo apt-get install python3-pyqt4
cd gns3-directory
sudo python3 setup.py install

GNS3 Server – Part2:

sudo apt-get install python3-setuptools
sudo apt-get install python3-netifaces
cd gns3-directory
sudo python3 setup.py install

Dynamips – Part3:

sudo apt-get install cmake
apt-get install libelf-dev
apt-get install uuid-dev
cd dynamips-directory
mkdir build
cd build
sudo cmake ..
sudo make install

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