I'm currently using Ubuntu 14.04 LTS, and I decided it was a good time to update to the latest version. However, if I run

sudo do-release-upgrade

The program starts downloading Wily Werewolf (15.10) packages. How can I force Ubuntu to download Xenial Xerus?

  • 5
  • Run do-release-upgrade -d
    – Pilot6
    May 9, 2016 at 14:31
  • ~ $ sudo do-release-upgrade -d Checking for a new Ubuntu release Err Upgrade tool signature 404 Not Found [IP: 80] Err Upgrade tool 404 Not Found [IP: 80] Fetched 0 B in 0s (0 B/s) WARNING:root:file 'utopic.tar.gz.gpg' missing Failed to fetch Fetching the upgrade failed. There may be a network problem. May 9, 2016 at 14:42
  • 2
    Does your /etc/update-manager/release-upgrades file end in Prompt=lts? If not, change it and try again. I just did this successfully in a VM. May 9, 2016 at 16:39
  • 1
    @MartínFixman Great! How about I post it as an answer then? May 9, 2016 at 17:57

2 Answers 2


Before doing the sudo do-release-upgrade -d, make sure that your /etc/update-manager/release-upgrades file ends in Prompt=lts. This will enable the upgrade tool to fetch the next LTS release (16.04) instead of just the next release (15.10).

  • Should he backup his data ?
    – userDepth
    May 10, 2016 at 15:16
  • 1
    He should also wear a seatbelt in a motor vehicle. But these are not things he asked about. May 10, 2016 at 17:29
  • Yeah I maybe he has nine lives and should pay for reincarnation services ... Where's be nice now?, when you gotta think.
    – userDepth
    May 10, 2016 at 17:35
  • Seriously, if you look at the comments on the original question, he already tried it and it worked for him. May 10, 2016 at 17:36
  • Ok I'll delete my answer then.
    – userDepth
    May 10, 2016 at 19:05

You will be able to have your 14.04 LTS version identified ad upgradable to the 16.04 LTS version when the first 'Point Release' for 16.04.1 is available - currently scheduled for July 21, 2016. Announced release schedule

If your desire is to test your current hardware and software compatibility with Xenial you can make a live session of Xenial for testing. Make a persistent USB instance.

  • So concise, pertinent, correct information is downgraded!
    – pfeiffep
    May 9, 2016 at 15:55

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

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