Step 1: Open up Terminal for dependencies

sudo apt-get update

sudo apt-get install python

sudo apt-get install qt4-dev-tools

sudo apt-get install pyqt4-dev-tools

sudo apt-get install libncurses5-dev zlib1g-dev libsdl-dev libpcap-dev

exit



Step 2/:D/ownload GNS3 ver 0.8.2 and extract in /opt



cd /opt

sudo wget http://sourceforge.net/projects/gns-3/f ... z/download



sudo tar -xjvf GNS3-0.8.2-src.tar.gz

sudo rm GNS3-0..8.2--src.tar.gz

sudo mv GNS3-0..8.2--src /opt/GNS3



or you can download manually from GNS site (http://www.gns3.net/download/) .





Step 3: Create the following directories in Ubuntu:

These directories will be used by GNS3 – such as projects – where your working projects will be stored, cache, temp, IOS images, etc.



cd /opt/GNS3

sudo mkdir Dynamips

sudo mkdir IOS

sudo mkdir Project

sudo mkdir Cache

sudo mkdir tmp

sudo chmod o+rw -R ./Project

sudo chmod o+rw -R ./tmp

sudo chmod o+rw -R ./IOS



Step 4 /:D/ownload binary of dynamips and make it executable



cd Dynamips ie (/opt/GNS3/Dynamips)

sudo wget http://www.ipflow.utc.fr/dynamips/dynam ... -amd64.bin

sudo chmod +x ./dynamips-0.2.8-RC2-amd64.bin



Step 5: . Go to edit | preferences and in the ‘Terminal command:’ section type in:

gnome-terminal -t %d -e ‘telnet %h %p’ > /dev/null 2>&1 &



Step 6. Under ‘Paths’ change the ‘Project directory:’ to



/opt/GNS3/Project

and the ‘IOS/PIX/ASA directory:’ to

/opt/GNS3/IOS



Step 7. Click on Dynamips tab on the left

For the ‘Executable path:’ type in

/opt/GNS3/Dynamips/dynamips-0.2.8-RC2-amd64.bin



Step 8. Change the ‘Working directory:’ to

/opt/GNS3/tmp

Click on the Capture tab on the left



Step 9. For the ‘Working directory for capture files:’ change it to

/opt/GNS3/Project



Step 10 For Qemu



wget http://download.savannah.gnu.org/releas ... 1.0.tar.gz

tar xvzf qemu-0.11.0.tar.gz

cd qemu-0.11.0

wget http://downloads.sourceforge.net/gns-3/ ... h?download

First copy this line :> patch -p1 -i qemu-0.11.0-olive.patch

then this line :> ./configure --target-list=i386-softmmu

make

sudo make install







Change qemu path to /usr/bin/qemu and qemu-img path to /usr/bin/qemu-img



Tip: if u want to run ASA then run first “directory/qemuwrapper/qemuwrapper.py” in terminal



source : http://forum.gns3.net/topic4690.html