1) Overwriting:

Yesterday, Ubuntu overwrote pkg "base-files", again.
Like last time.


2) PackageDataBase
Wrongly, searching for "extra" gives "optional".

$ command aptitude --disable-columns search '?exact-name(akonadi-backend-mysql)?installed?priority(extra)' -F '%?p %?P'

akonadi-backend-mysql optional


3) Thanks for attention.

Details concerning 'overwitten base-files':

$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=16.04
DISTRIB_CODENAME=xenial
DISTRIB_DESCRIPTION="Ubuntu 16.04.3 LTS"


$ cat /etc/os-release
NAME="Ubuntu"
VERSION="16.04.3 LTS (Xenial Xerus)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 16.04.3 LTS"
VERSION_ID="16.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
VERSION_CODENAME=xenial
UBUNTU_CODENAME=xenial

# Edit

And of course this one:

$ cat /etc/issue
Ubuntu 16.04.3 LTS \n \l