SHELL

start docker api

# Edit this line in the docker config file
nano  /lib/systemd/system/docker.service;
# Find the line which starts with ExecStart and adds -H=tcp://0.0.0.0:2375 
#to make it look like
ExecStart=/usr/bin/dockerd -H=fd:// -H=tcp://0.0.0.0:2375