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I'm using Ubuntu 12.10 installed alongside with Windows 7. Can I just have a system backup in the form of one or more DVD(s) so that I can restore the system with every package that are previously installed and if possible can I make use of that DVD(s) as a live CD with all the previously installed packages?

If "Back In Time(root)" is installed in my system, will it be useful?

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You can always use something like clonezilla to backup your ubuntu installed software. Another option is to generate a list of the software like this....

aptitude search -F '%100p' '~i!~M' > my-styff

copy it to a flash drive and/or email it to yourself. Saves lots of space as long as you are talking about standard install stuff.

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Can you tell little bit more in detail about Clonezilla? As per the link you suggested Clonezilla live is what I require. But I dunno how to install and make use of it. Google gives result about the Clonezilla server. What is Clonezilla server now? – user146312 Apr 5 '13 at 12:36

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