Ubuntu – How to find out what version of Ubuntu was originally installed


Given a machine that may or may not have been through a number of release upgrades, how can I find out the version of Ubuntu that was originally installed? Assuming that logging configuration has not been changed from default.

Best Answer

  • If you have not done manual modifications, you should see the utilised installation media on the top of /etc/apt/sources.list:

    # deb cdrom:[Kubuntu 10.04 LTS _Lucid Lynx_ - Release i386 (20100427)]/ lucid main restricted
    # See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
    # newer versions of the distribution.

    Apport (the Ubuntu bug reporter) uses /var/log/installer/media-info to determine the installation media which contains:

    Kubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100427)

    This only works if you kept the /var/log/installer folder.

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