Ubuntu Desktop Live DVD 14.04.1 gives the same error. Simply booted into Live mode, opened a gnome-terminal, and tried to update,
ubuntu@ubuntu:~$ sudo apt-get update Ign:1 cdrom://Ubuntu 16.04.1 LTS _Xenial Xerus_ - Release amd64 (20160719) xenial InRelease Hit:2 cdrom://Ubuntu 16.04.1 LTS _Xenial Xerus_ - Release amd64 (20160719) xenial Release Hit:4 http://security.ubuntu.com/ubuntu xenial-security InRelease Hit:5 http://archive.ubuntu.com/ubuntu xenial InRelease Hit:6 http://archive.ubuntu.com/ubuntu xenial-updates InRelease
** (appstreamcli:5561): CRITICAL **: Error while moving old database out of the way. AppStream cache update failed. Reading package lists... Done
I didn't make any other changes to the configuration, or install any other software.
Ubuntu Desktop Live DVD 14.04.1 gives the same error. Simply booted into Live mode, opened a gnome-terminal, and tried to update,
ubuntu@ubuntu:~$ sudo apt-get update security. ubuntu. com/ubuntu xenial-security InRelease archive. ubuntu. com/ubuntu xenial InRelease archive. ubuntu. com/ubuntu xenial-updates InRelease
Ign:1 cdrom://Ubuntu 16.04.1 LTS _Xenial Xerus_ - Release amd64 (20160719) xenial InRelease
Hit:2 cdrom://Ubuntu 16.04.1 LTS _Xenial Xerus_ - Release amd64 (20160719) xenial Release
Hit:4 http://
Hit:5 http://
Hit:6 http://
** (appstreamcli: 5561): CRITICAL **: Error while moving old database out of the way.
AppStream cache update failed.
Reading package lists... Done
I didn't make any other changes to the configuration, or install any other software.