dockerd
Docker daemon background service
TLDR
Run Docker daemon
$ dockerd
Listen on specific sockets$ dockerd -H unix://[path/to/tmp.sock] -H tcp://[ip_address]
Specify PID file$ dockerd -p [path/to/pid_file]
Run in debug mode$ dockerd -D
Set log level$ dockerd -l [debug|info|warn|error|fatal]
SYNOPSIS
dockerd [options]
DESCRIPTION
dockerd is the Docker daemon process that manages containers, images, networks, and volumes. It's a persistent background service that listens for Docker API requests.
Usually managed by systemd rather than run directly.
PARAMETERS
-H, --host socket
Socket to listen on (unix://, tcp://, fd://)-p, --pidfile file
PID file path-D, --debug
Enable debug mode-l, --log-level level
Logging level--storage-driver driver
Storage driver (overlay2, devicemapper, etc.)--data-root path
Root directory for Docker data
CONFIGURATION
/etc/docker/daemon.json
Main configuration file for the Docker daemon. Controls storage drivers, logging, networking, registry mirrors, and runtime settings.
CAVEATS
Requires root privileges or proper group membership. Configuration typically via /etc/docker/daemon.json. Exposing TCP socket without TLS is insecure.
SEE ALSO
docker(1), systemctl(1), containerd(8)