Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I'm thinking about upgrading my Intrepid Ibex Ubuntu installation to Jaunty Jackalope, but I want to know if any of the new packages it installs will conflict with the many libraries I've installed. Is there a way to make it list the packages it will install without actually installing anything? Thanks.

share|improve this question
up vote 7 down vote accepted

As far as I know, you should be able to use the standard options with apt-get dist-upgrade to simulate running this command without actually performing the upgrade.

   -s, --simulate, --just-print, --dry-run, --recon, --no-act
       No action; perform a simulation of events that would occur but do not actually change the
       system. Configuration Item: APT::Get::Simulate.

       Simulate prints out a series of lines each one representing a dpkg operation, Configure (Conf),
       Remove (Remv), Unpack (Inst). Square brackets indicate broken packages with and empty set of
       square brackets meaning breaks that are of no consequence (rare).

   -u, --show-upgraded
       Show upgraded packages; Print out a list of all packages that are to be upgraded. Configuration
       Item: APT::Get::Show-Upgraded.
share|improve this answer
Thanks; I'll try that. – Evan Kroske Aug 29 '09 at 18:50
This does NOT simulate an upgrade from one distribution to another. Ref. -> Maintenance commands. – Runium Apr 27 '13 at 17:08

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.