Problème installation mysql

Bonjour,

Je souhait installer mysql sur ma raspberry.

Voici mon erreur :

> apt-get install mysql-server

apt-get install mysql-server
Reading package lists... Done
Building dependency tree
Reading state information... Done
mysql-server is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 33 not upgraded.
2 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue [Y/n]? y
Setting up mysql-server-5.5 (5.5.28+dfsg-1) ...
[ ok ] Stopping MySQL database server: mysqld.
insserv: warning: script 'xbmc' missing LSB tags and overrides
insserv: warning: script 'console-setup' missing LSB tags and overrides
insserv: warning: script 'avahi-daemon' missing LSB tags and overrides
insserv: warning: script 'winbind' missing LSB tags and overrides
insserv: warning: script 'udev' missing LSB tags and overrides
insserv: warning: script 'cron' missing LSB tags and overrides
insserv: warning: script 'dbus' missing LSB tags and overrides
insserv: warning: script 'xinetd' missing LSB tags and overrides
insserv: There is a loop between service openvpn and dbus if stopped
insserv:  loop involving service dbus at depth 4
insserv:  loop involving service network-manager at depth 3
insserv: There is a loop between service network-manager and openvpn if stopped
insserv:  loop involving service openvpn at depth 5
insserv:  loop involving service udev at depth 4
insserv: exiting now without changing boot order!
update-rc.d: error: insserv rejected the script header
dpkg: error processing mysql-server-5.5 (--configure):
 subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of mysql-server:
 mysql-server depends on mysql-server-5.5; however:
  Package mysql-server-5.5 is not configured yet.

dpkg: error processing mysql-server (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 mysql-server-5.5
 mysql-server
E: Sub-process /usr/bin/dpkg returned an error code (1)

Pouvez vous me dire qu'elle est le problème?

Car forcement quant le lance wordpress il me dit "Votre installation PHP ne dispose pas de MySQL. Extension requise pour WordPress.".

merci d'avance