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.
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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