yak@xeuyakzas:~$ journalctl -b -p err
-- Logs begin at jeu. 2017-06-08 07:02:20 CEST, end at jeu. 2017-06-08 07:05:58 CEST. --
juin 08 07:02:21 xeuyakzas liblogging-stdlog[205]: Could not open output pipe '/dev/xconsole':: No such file or directory [v8.23.0 try http://www.rsyslog.com/e/2039 ]
juin 08 07:02:38 xeuyakzas ntpd[683]: cap_set_proc() failed to drop root privileges: Operation not permitted

sudo service rsyslog stop
sudo mknod -m 640 /dev/xconsole c 1 3
sudo chown syslog:adm /dev/xconsole
sudo service rsyslog start

sudo service rsyslog reload
sudo tail /var/log/messages