Setting up Ubuntu & GNS3

For me, a completely Linux idiot, trying to install Ubuntu 12.0.4 and GNS3.
The below steps for my own reference in case I need it for the future.

1. Download the Ubuntu from the website.
2. Trying dual boot with XP but it failed. Forget it, I just use the single HDD for the Ubuntu.
3. After installing the Ubuntu, I follow the below link to install the GNS3
http://blog.ipexpert.com/2010/07/05/gns3-on-ubuntu-910-the-ipexpert-way/
4. First problem I face is I cannot find the Synaptic Package Manager.
It is disable by default in the Ubuntu 12.0.4.
5. I search it in the help and found out that I need to install via the Software center.
6. 1st problem solved. Synaptic Package Manager installed
7. Able to run the Synaptic Package Manager and installed the GNS3
8. I am using the auto configuration that provided by IPexpert
9. 2nd problem faced. I cannot access to the /root folder
After searching the web, I can access using the sudo command
10. 3rd problem faced. Where can I type the command in Linux.
11. Terminal window is use for CLI. It can find using the Dash Board
12. The most useful command to copy , move, rename, delete files in /root folder as below
gksudo nautilus
13. And finally able to run the GNS3