커널 로그

journalctl -kf


서비스 로그 

journalctl -u <unit_name> -f


unit_name 은 

systemctl list-unit-files 로 listing 


전체 로그 보기

journalctl -xef





systemctl daemon-reload


systemctl list-unit-files


systemctl status docker




=======

systemctl enable docker

systemctl disable docker


systemctl list-unit-files | grep docker






ref : https://docs.docker.com/engine/reference/commandline/dockerd/#linux-configuration-file


/etc/docker/daemon.json



/lib/systemd/system/docker.service



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