Problem with installing from repository

gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring /tmp/tmp.ASyOPV87XC --trustdb-name /etc/apt/trustdb.gpg --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --recv-keys --keyserver hkp://keyserver.ubuntu.com:80 0xcbcb082a1bb943db

libmariadbclient18:

  Depends: libmysqlclient18 (=5.5.33a+maria-1~precise) but 5.5.34-0ubuntu0.12.04.1 is to be installed

root@fitpc3-shestero:~# sudo apt-get install python-software-properties

Reading package lists... Done

Building dependency tree       

Reading state information... Done

python-software-properties is already the newest version.

The following packages were automatically installed and are no longer required:

  linux-headers-3.5.0-23-generic linux-headers-3.5.0-23

Use 'apt-get autoremove' to remove them.

0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

root@fitpc3-shestero:~# sudo apt-key adv --recv-keys --keyserver hkp://keyserver.ubuntu.com:80 0xcbcb082a1bb943db

Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring /tmp/tmp.dtwh7Wc7Ej --trustdb-name /etc/apt/trustdb.gpg --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --recv-keys --keyserver hkp://keyserver.ubuntu.com:80 0xcbcb082a1bb943db

gpg: requesting key 1BB943DB from hkp server keyserver.ubuntu.com

gpgkeys: key CBCB082A1BB943DB not found on keyserver

gpg: no valid OpenPGP data found.

gpg: Total number processed: 0

root@fitpc3-shestero:~# sudo add-apt-repository 'deb http://mariadb.mirror.nucleus.be//repo/5.5/ubuntu precise main'

root@fitpc3-shestero:~# sudo apt-get update

Hit http://ru.archive.ubuntu.com precise Release.gpg

<< … >>

Fetched 198 B in 1s (103 B/s)

Reading package lists... Done

W: GPG error: http://mariadb.mirror.nucleus.be precise Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY CBCB082A1BB943DB

root@fitpc3-shestero:~# sudo apt-get install mariadb-server

Reading package lists... Done

Building dependency tree       

Reading state information... Done

Some packages could not be installed. This may mean that you have

requested an impossible situation or if you are using the unstable

distribution that some required packages have not yet been created

or been moved out of Incoming.

The following information may help to resolve the situation:

The following packages have unmet dependencies:

 mariadb-server : Depends: mariadb-server-5.5 (= 5.5.33a+maria-1~precise) but it is not going to be installed

E: Unable to correct problems, you have held broken packages.

root@fitpc3-shestero:~# 

root@fitpc3-shestero:~# gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring /tmp/tmp.ASyOPV87XC --trustdb-name /etc/apt/trustdb.gpg --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --recv-keys --keyserver hkp://keyserver.ubuntu.com:80 0xcbcb082a1bb943db

gpg: keyring `/tmp/tmp.ASyOPV87XC' created

gpg: requesting key 1BB943DB from hkp server keyserver.ubuntu.com

gpg: key 1BB943DB: public key "MariaDB Package Signing Key <package-signing-key@mariadb.org>" imported

gpg: no ultimately trusted keys found

gpg: Total number processed: 1

gpg:               imported: 1

.........