14.04 - How to upgrade ubuntu if i get 'Authenticating the upgrade failed'? - Ask Ubuntu


i want upgrade ubuntu 14.04 distribution 16.04.

i'm working in domain buy have sudo permissions, repositories point our private repositories

i try upgrade command do-release upgrade , application , got error.

$ sudo do-release-upgrade checking new ubuntu release get:1 upgrade tool signature [198 b]                                            get:2 upgrade tool [1262 kb]                                                    fetched 1262 kb in 0s (0 b/s)                                                   authenticate 'xenial.tar.gz' against 'xenial.tar.gz.gpg'  gpg exited 1 debug information:    gpg: signature made dc 26 oct 2016 16:32:27 cest using dsa key id 437d05b5 gpg: /tmp/ubuntu-release-upgrader-gzuou970/trustdb.gpg: trustdb created gpg: bad signature "ubuntu archive automatic signing key <ftpmaster@ubuntu.com>"  authentication failed    authenticating upgrade failed. there may problem network or server.

and when try upgrade through software updater error.

enter image description here

how this?

make sure have latest version of update-manager-core installed.

sudo apt-get update; sudo apt-get install update-manager-core

then re-run do-release-upgrade.

if still fails, issue private repository, not locally.

you should manually force refresh of private repository, because it's possible xenial.tar.gz file has changed , repository has stale version.


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