There are a lot of people that have problems upgrading to 13.04... now every time they are told to put this in the Terminal: sudo do-release-upgrade -d. Now I've been wondering what the -d stands for.

In the man pages they speak of a devel release. Can someone explain to me what a devel release is?


Not devil, but devel. It's short for development :)

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    Ubuntu does a lot of development on the Ubuntu OS, and you can upgrade your OS to that release by running the above command. You can find more info at ubuntu.com/testing, and I'd advise you don't run that command as your OS will be quite unstable. ;) – somoso Apr 29 '13 at 15:03
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    ohhh yeah I'll read more carefully next time... :D Thanks now i can rest in peace :P – Meintjes Apr 29 '13 at 15:05
  • Hmm, since in the question the "devil" was corrected to "devel", this answer doesn't make much sense now. – user31389 Apr 30 '20 at 11:39

It says quite clearly devel-release, not devil. And what the command does is to upgrade your current release to the next development release.

 -d, --devel-release

 Check if upgrading to the latest devel release is possible

Ubuntu Wiki.

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