Today i am going to tell you how you can share softwares form your ubuntu system to your friends or just back up for yourself for future use.Just make sure that the version is exactly same.For example use softwares from ubuntu 12.04 for 12.04 only,else you may encounter unseen errors.One final note:You always learn by playing around,so never hesitate to try your wildest idea.
So here is how you do it.
The softwares you install via Ubuntu Software Center or Terminal Or Synaptic on any damm way you can think,it all goes to /var/cache/apt/archives. Here you will find all the files for the packages you have installed so far.
Clean all this by typing following in terminal:
sudo apt-get clean
Now lets install a new software.For Example synapse.Its one of its kind shortcut utility for launching applications.
Go to software Center and install….
Select Synapse,i.e. Second entry in screenshot,and install it via left side button.It will take time depending on your INTERNET speed.
Once installation is finished,go to terminal and type following
it will ask for the password.give your login password.you will have ubuntu file manager with root privileges.Now navigate to /var/cache/apt/archives.
Copy all files in any folder.Now you can share that folder.All you have to do is put back all files in /var/cache/apt/archives and install the software via Software Center,and that also is possible in off line mode.