Which version of package `software-properties-common` do you have? Juno release was added with version `0.92.37.2`, so check if there is any update (apt-get update; apt-get install software-properties-common) If not, maybe you are using a mirror not yet updated (I don't know how often they are usually updated, but the mentioned version was released on October 15th) .a. -- antonio.s.messina at gmail.com antonio.messina at uzh.ch +41 (0)44 635 42 22 S3IT: Service and Support for Science IT http://www.s3it.uzh.ch/ University of Zurich Winterthurerstrasse 190 CH-8057 Zurich Switzerland