My laptop hard-disk has several OS partitions, e.g.
1. sda6 - 500gb (used for storing all my data)
2. sda3 - ubuntu 10.04
3. sda4 - linux mint
4. sda5 - ubuntu 12.04
I end up installing duplicate packages across all these similar operating systems.
How can I install the various packages e.g. 'vim', 'tmux', 'mutt' etc. only once,
i.e do only one time installation on disk?
That way, if I plan to reinstall Ubuntu, I don't have to reinstall all the packages.
As an analogy, on windows I can install a software on a usb stick, and can run it from
I can re-install windows or use a different version, but the software will still work.