• Go to terminal and type the followoing to install the application.

        sudo apt-get install samba smbfs

• http://ubuntumanual.org/posts/75/how-to-install-samba-server-for-filefol...
•                    Then go to terminal and type the following

                   sudo cp /etc/samba/smb.conf /etc/samba/smb.conf_backup
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• Read #How to install Samba Server for files/folders sharing service
• To add network user
  • Read #How to add/edit/delete system users

            sudo smbpasswd -a system_username

            gksudo gedit /etc/samba/smbusers 

• Insert the following line into the new file

            system_username = "network username" 

• To remove an application from your system simply goto system-->administration-->synaptic package manager and then search for the package u want to uninstall.Then right click on the package and unmark it .Then Apply the changes.
• You can also uninstall the package using commad line option.ie goto applications-->accessories-->terminal and type the following

                           sudo apt-get  --purge autoremove package
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• Eclipse IDE is an alternative of Netbeans IDE. Actually, it is somewhat more popular among Linux users.
   read more »

• Netbeans is a platform independent IDE for Java. But it also supports C/C++, Ruby, portals and lots of other stuffs as plug-ins. At the point of writing, version 5.5.1 is the latest stable release and can be installed by:

          sudo apt-get install netbeans5.5
 
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• Go to terminal and type the following to install the software

           sudo apt-get install ubuntustudio-video

  To add any third party repositories,Follow the steps

• Go to
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  System-->Administration-->Software Sources-->Third-party software-->Add
  

• Enter the name of  repository you want to add