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Old 11-04-2009, 04:47 PM   #1
Registered: Jun 2008
Location: St.-Petersburg, Russia
Distribution: (B)LFS, Ubuntu, SliTaz
Posts: 403

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How to determine difference between my application list and default one in ubuntu

I have used ubuntu for some time, installed&removed many packages, and now i need to determine which packages are removed&installed on my installation, comparing this list to default one.
If i had another machine with just installed ubuntu, it would be just as easy as list installed packages on two machines and then diff these lists. But i don't have another machine to clean install ubuntu on it.
How can i do this without having clean ubuntu installation?
Old 11-04-2009, 05:05 PM   #2
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Registered: Dec 2005
Location: Somewhere on the String
Distribution: Debian Wheezy (x86)
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Can you clean install to a virtual machine like qemu?
Old 11-04-2009, 10:02 PM   #3
Registered: Apr 2006
Location: Montreal,Quebec
Distribution: Gentoo
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dpkg --get-selections

on both an Ubuntu live-CD and in your installation, then use the diff command to compare both.
Old 11-05-2009, 10:32 AM   #4
Registered: Jun 2008
Location: St.-Petersburg, Russia
Distribution: (B)LFS, Ubuntu, SliTaz
Posts: 403

Original Poster
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Thank you both - i will just start LiveCD on QEMU and use dpkg --get-selections command, comparing its output to another machine's output


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