Docker service don't start


i would like to delete some container.

[FONT=monospace]**docker version **

 Version:           19.03.12 
 API version:       1.40 
 Go version:        go1.13.15 
 Git commit:        48a66213fe17 
 Built:             Thu Nov 12 00:00:00 2020 
 OS/Arch:           linux/amd64 
 Experimental:      false 
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

journalctl -xe return

░░The process' exit code is 'exited' and its exit status is 1.
déc 10 15:38:48 linux-77w7 systemd[1]: **docker.service: Failed with result 'exit-code'.**
░░Subject: Unit failed
░░Defined-By: systemd
░░The unit docker.service has entered the 'failed' state with result 'exit-code'.
déc 10 15:38:48 linux-77w7 systemd[1]: **Failed to start Docker Application Container Engine.**
░░Subject: L'unité (unit) docker.service a échoué
░░Defined-By: systemd


any idea?

Whenever a service has a problem, check the “status” which should include a likely relevant snippet of the system log identifying why the problem happened

systemctl status *some.service *