Ubuntu log /var/log/kern.log 没有message？

log setting 

 /etc/rsyslog.d/50-default

https://blog.csdn.net/u011723812/article/details/77389105

http://blog.chinaunix.net/uid-26569496-id-3199434.html

$ dmesg -H 

https://www.cnblogs.com/EasonJim/p/8413535.html

root@me-desktop:/var/log# vim /etc/rsyslog.d/50-default.conf
root@me-desktop:/var/log# sudo service rsyslog restart