Where is the configuration file after docker installation?

CentOS 7 uses systemd to manage the docker process. So if we want to know the file location of docker, we can view the systemd configuration:

Use the command to view the systemd configuration of docker:

cat /usr/lib/systemd/system/docker.service

As shown:

You can see that the configuration file started by systemd is obtained by environment variables. The environment variables are in /etc/sysconfig/docker, /etc/sysconfig/docker-storage, /etc/sysconfig/docker-network, and can be viewed in sequence.

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