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Say I have Ubuntu installed in a hard drive

What can I do to generate a liveUSB that is as similar as possible to the installation ?

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(similar to… , but there, he wants a kiosk instalation of ubuntu, and accepts other alternatives that dont involve liveUSB) – josinalvo Jul 3 '12 at 0:35
up vote 4 down vote accepted

I recommend using Remastersys.

This will create a hardware-independent LiveCD ISO backup of your system; you can then use a tool such as Unetbootin to "burn" the ISO to a USB and create a LiveUSB.

Remastersys includes both command-line and GUI front-ends. Note that the author recommends starting with a "clean" install and then customizing it to maintain the highest compatibility for the LiveCD/LiveUSB. There is also a 4GB final size limitation, which means that your Ubuntu install should be around 8GB at most, and you should not include any media files, deb files, etc.

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I havent tryed it yet, but it looks promissing – josinalvo Sep 14 '12 at 2:41
It looks like that remastersys tool is discontinued – Scott Szretter Mar 16 '14 at 14:46
There is a fork of Remastersys that is still under active development, available here: – William Lawn Stewart Apr 18 '14 at 9:35

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