Ubuntu error authenticating some packages could mean the updates were corrupted or compromised.
1. Reinstall Ubuntu using up to date Installer
"Ubuntu error authenticating some packages" might be caused by upgrading an old version of Ubuntu that uses old Gnome. To fix the problem, get the latest Ubuntu installer that is available.
Make sure to.
- Backup your file.
- Create a list of your software
- Clean install the latest version of Ubuntu.
- Reinstall the software and configurations your personal settings.
“Ubuntu error authenticating some packages” may also be caused by it security protocol. You may want to enable Allow Unauthenticated. Use the command below.
A temporary workaround, create a file
/etc/update-manager/release-upgrades.d/unauth.cfg
filled with the following
[Distro]
AllowUnauthenticated=yes
Now try to update your Ubuntu
sudo apt-get update
sudo apt-get upgrade
sudo apt-get install update-manager-core
sudo do-release-upgrade