COMMANDE POUR ARRÊTER LES LOGS RPi
Syslog has been replaced by rsyslog on numerous OS. So, on Debian > 5, Ubuntu > 11.2, Centos 6.x the following command line would stop it:
service rsyslog stop
Then, you can disable it at boot:
systemctl disable rsyslog
to enable it again at boot:
systemctl enable rsyslog