If you are running GNS3 WorkBench and would like to upgrade GNS3 to the latest 0.8.3, here is how you do it. Thanks to JJ for asking.
Summary:
cd ~/Downloads
wget http://sourceforge.net/projects/gns-3/files/GNS3/0.8.3/GNS3-0.8.3-src.zip
unzip GNS3-0.8.3-src.zip
rm -rf /opt/GNS3/docs/
rm -rf /opt/GNS3/qemuwrapper/
rm -rf /opt/GNS3/src
rm -rf /opt/GNS3/vboxwrapper/
mv -f ~/Downloads/GNS3-0.8.3-src/* /opt/GNS3
rm -rf ~/Downloads/GNS3*
Details:
1. Download one of the sources from http://www.gns3.net/download/ – say GNS3-0.8.3-src.zip. I downloaded it to ~/Downloads
cd ~/Downloads
wget http://sourceforge.net/projects/gns-3/files/GNS3/0.8.3/GNS3-0.8.3-src.zip
2. unzip it
unzip GNS3-0.8.3-src.zip
This will create a directory called GNS3-0.8.3-src
3. The rest is probably easiest from the file manager, but I’ll give you the commands anyway:
3.1 Remove the following directories from /opt/GNS3
rm -rf /opt/GNS3/docs/
rm -rf /opt/GNS3/qemuwrapper/
rm -rf /opt/GNS3/src
rm -rf /opt/GNS3/vboxwrapper/
3.2 Move the contents of ~/Downloads/GNS3-0.8.3-src to /opt/GNS3
mv -f ~/Downloads/GNS3-0.8.3-src/* /opt/GNS3
4. Remove the zip file you downloaded and the empty directory you created when you unzipped it
rm -rf ~/Downloads/GNS3*
5. The first time you run it, it will detect that you have changed versions and ask if you want to re-initialise everything. Say No
You will then have to quit and restart if you were loading a lab.
RedNectar's Blog 