Difference between Live Session and Full Installation.
You are running in fact Ubuntu.
There are few differences, most importantly, whenever you need to start a program, the liveCD needs to run it from the CD, which is slower. Also, you cannot save anything permanently (unless you specifically attach ie. mount your hard disk).
Finally, an installed system will be better tuned to your hardware, faster, and more up-to-date (packages on the LiveCD may be obsolete).
One caveat are proprietary drivers, notably Nvidia drivers. Nvidia drivers (which have 3D support) cannot be installed automatically by the Ubuntu installer, so if you have Nvidia, after the installation instead of the eye-candy of a 3D desktop you will have a much less eye-catching 2D desktop. However, Ubuntu will then tell you that you should install the Nvidia drivers from the Nvidia site, and you will be able to do so with a single mouse click, after which you will have your nice desktop back.
Otherwise it's pretty much the same stuff.
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Robert
Updated on September 18, 2022Comments
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Robert over 1 year
When I boot a computer from a Ubuntu disc and choose an option to try ubuntu. How exactly live session runs? Is it a full running instance of ubuntu os or some sort of visual interface on top of windows?
In short, what is the difference between ubuntu which was booted from cd or usb disk and fully installed version of ubuntu os?
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Warrick over 11 yearsYou probably want to change the title of your question to summarize what your question is, otherwise I don't think it'll attract much attention. Maybe "What's the difference between Ubuntu running from a LiveCD or installing it?"
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atenz over 11 years@Warrick - you can always edit it , to address it better :)
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atenz over 11 yearsAlso possible duplicates or maybe similar to askubuntu.com/questions/156026/… and askubuntu.com/questions/157085/…
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nanofarad over 11 yearsDo note that the nVidia drivers at least 50MB, possibly more.