Please switch to an official mirror of the Ubuntu archive. From VarLogDistupgradeMainlog.txt:
2017-02-28 00:29:08,837 DEBUG examining: 'deb http://ubuntu.excellmedia.net/archive/ trusty main universe restricted multiverse' 2017-02-28 00:29:08,839 DEBUG entry '# deb http://ubuntu.excellmedia.net/archive/ xenial main universe restricted multiverse # disabled on upgrade to xenial' was disabled (unknown mirror) 2017-02-28 00:29:08,839 DEBUG examining: 'deb-src http://ubuntu.excellmedia.net/archive/ trusty restricted main multiverse universe #Added by software-properties' 2017-02-28 00:29:08,840 DEBUG entry '# deb-src http://ubuntu.excellmedia.net/archive/ xenial restricted main multiverse universe #Added by software-properties disabled on upgrade to xenial' was disabled (unknown mirror) 2017-02-28 00:29:08,840 DEBUG examining: 'deb http://ubuntu.excellmedia.net/archive/ trusty-proposed restricted main multiverse universe' 2017-02-28 00:29:08,841 DEBUG entry '# deb http://ubuntu.excellmedia.net/archive/ trusty-proposed restricted main multiverse universe # disabled on upgrade to xenial' was disabled (unknown mirror) 2017-02-28 00:29:08,842 DEBUG examining: 'deb http://ubuntu.excellmedia.net/archive/ trusty-backports restricted main multiverse universe' 2017-02-28 00:29:08,843 DEBUG entry '# deb http://ubuntu.excellmedia.net/archive/ trusty-backports restricted main multiverse universe # disabled on upgrade to xenial' was disabled (unknown mirror) 2017-02-28 00:29:08,843 DEBUG examining: 'deb http://ubuntu.excellmedia.net/archive/ trusty-updates restricted main multiverse universe' 2017-02-28 00:29:08,844 DEBUG entry '# deb http://ubuntu.excellmedia.net/archive/ trusty-updates restricted main multiverse universe # disabled on upgrade to xenial' was disabled (unknown mirror) 2017-02-28 00:29:08,844 DEBUG examining: 'deb http://security.ubuntu.com/ubuntu/ trusty-security restricted main multiverse universe' 2017-02-28 00:29:08,845 DEBUG entry 'deb http://security.ubuntu.com/ubuntu/ xenial-security restricted main multiverse universe' updated to new dist 2017-02-28 00:29:08,845 DEBUG examining: 'deb http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu trusty main' 2017-02-28 00:29:08,846 DEBUG entry '# deb http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu xenial main # disabled on upgrade to xenial' was disabled (unknown mirror) 2017-02-28 00:29:08,846 DEBUG examining: 'deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main' 2017-02-28 00:29:08,847 DEBUG entry '# deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main # disabled on upgrade to xenial' was disabled (unknown mirror) 2017-02-28 00:29:08,848 ERROR No valid mirror found You can find a list here: https://launchpad.net/ubuntu/+archivemirrors ** Changed in: ubuntu-release-upgrader (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1668374 Title: update and upgrade problems To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1668374/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
