I was upgrading from 13.04 to 13.10 via ssh (didn't use screen). My ssh connection was interrupted when do-release-upgrade script was about to remove obsolete packages. Now when I reconnect and run it it just says No new release found. How to finish upgrade process?



sudo dpkg --configure -a


sudo apt-get dist-upgrade

Finally run (probably not needed):

sudo apt-get upgrade
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  • 1
    I don't know why this was downvoted. This is the correct answer. My do-release-upgrade crashed upgrading 14.04 to 16.04, and re-running it said there was "No new release found" despite most packages still being for 14. Running these commands completed the upgraded successfully. The only caveat is that I had to run sudo killall dpkg to kill the stuck dpkg process. – Cerin Feb 4 '17 at 14:59

do-release-upgrade saves a log file about all the actions taken during the upgrade in /var/log/dist-upgrade there are also other logs in /var/log/apt, /var/log/dpkg which may be relevant.

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  • Why do I need the logs? Where were no errors, command was just interrupted just at the beginning of step of removing obsolete packages. – Poma Dec 16 '13 at 15:22
  • That your SSH connection dies doesn't mean that the process stopped/was killed. If it's not too late you can check ps ax | grep do-release and will find the process still running. You can catch it again using something like this serverfault.com/a/272526/180142 – Braiam Dec 16 '13 at 15:31
  • just checked - it is not running – Poma Dec 16 '13 at 15:51
  • check the logs and see what he did. – Braiam Dec 16 '13 at 16:00
  • As I already said it stopped after Start checking for obsolete pkgs message in log – Poma Dec 16 '13 at 16:24

Can you check /etc/update-manager/release-upgrades and see if it's set to "prompt=never"?

I had an issue where an old server that I inherited wasn't picking up the fact that a new LTS release was available. That was how I fixed it.


$ sudo cat /etc/update-manager/release-upgrades
# Default behavior for the release upgrader.

# Default prompting behavior, valid options:
#  never  - Never check for a new release.
#  normal - Check to see if a new release is available.  If more than one new
#           release is found, the release upgrader will attempt to upgrade to
#           the release that immediately succeeds the currently-running
#           release.
#  lts    - Check to see if a new LTS release is available.  The upgrader
#           will attempt to upgrade to the first LTS release available after
#           the currently-running one.  Note that this option should not be
#           used if the currently-running release is not itself an LTS
#           release, since in that case the upgrader won't be able to
#           determine if a newer release is available.
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