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My 12.04 system wants to run a partial upgrade, as part of which it proposes to remove certain MariaDB packages (see screenshot below). Attached is my sources.list file - I don't understand why the system should be proposing the removal of the MariaDB packages, given I have explicitly chosen MariaDB as a replacement for MySQL?

enter image description here

clive@cooler-master:~$ cat /etc/apt/sources.list
# deb cdrom:[Ubuntu 12.04 LTS _Precise Pangolin_ - Release i386 (20120423)]/ precise main restricted

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://gb.archive.ubuntu.com/ubuntu/ precise main restricted
deb-src http://gb.archive.ubuntu.com/ubuntu/ precise main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://gb.archive.ubuntu.com/ubuntu/ precise-updates main restricted
deb-src http://gb.archive.ubuntu.com/ubuntu/ precise-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://gb.archive.ubuntu.com/ubuntu/ precise universe
deb-src http://gb.archive.ubuntu.com/ubuntu/ precise universe
deb http://gb.archive.ubuntu.com/ubuntu/ precise-updates universe
deb-src http://gb.archive.ubuntu.com/ubuntu/ precise-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 
## team, and may not be under a free licence. Please satisfy yourself as to 
## your rights to use the software. Also, please note that software in 
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://gb.archive.ubuntu.com/ubuntu/ precise multiverse
deb-src http://gb.archive.ubuntu.com/ubuntu/ precise multiverse
deb http://gb.archive.ubuntu.com/ubuntu/ precise-updates multiverse
deb-src http://gb.archive.ubuntu.com/ubuntu/ precise-updates multiverse

## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://gb.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://gb.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse

deb http://security.ubuntu.com/ubuntu precise-security main restricted
deb-src http://security.ubuntu.com/ubuntu precise-security main restricted
deb http://security.ubuntu.com/ubuntu precise-security universe
deb-src http://security.ubuntu.com/ubuntu precise-security universe
deb http://security.ubuntu.com/ubuntu precise-security multiverse
deb-src http://security.ubuntu.com/ubuntu precise-security multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
deb http://archive.canonical.com/ubuntu precise partner
# deb-src http://archive.canonical.com/ubuntu precise partner

## This software is not part of Ubuntu, but is offered by third-party
## developers who want to ship their latest software.
deb http://extras.ubuntu.com/ubuntu precise main
deb-src http://extras.ubuntu.com/ubuntu precise main

# MariaDB 5.5 repository list - created 2012-09-21 09:23 UTC
# http://downloads.mariadb.org/mariadb/repositories/
deb http://ftp.heanet.ie/mirrors/mariadb/repo/5.5/ubuntu precise main
deb-src http://ftp.heanet.ie/mirrors/mariadb/repo/5.5/ubuntu precise main

# deb http://repository.spotify.com stable non-free

deb http://deb.opera.com/opera/ stable non-free

deb http://ppa.launchpad.net/yorba/ppa/ubuntu precise main
deb-src http://ppa.launchpad.net/yorba/ppa/ubuntu precise main
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2 Answers 2

2

If you are trying a dist-upgrade (seems so?) it may com from Ubuntu commenting out foreign repositories while upgrading to a newer version. Besides that there shouldn't be an incident, where MariaDB is uninstalled (if it wasn't installed as a dependency) automagically.

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MariaDB cover this in their article on installing deb packages, best way to fix it is by pinning the MariaDB repo. Which you can do by following these instructions: https://mariadb.com/kb/en/installing-mariadb-deb-files/#pinning-the-mariadb-repository (if you scroll up they also explain why it happens)

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