Enable docker remote API using bash

enable_docker_remote_api.sh

#!/bin/bash

# Absolute path of docker systemd file
dockersystemd='/lib/systemd/system/docker.service'

# Retrieve the line number of the ExecStart
execstartline=$(grep -n 'ExecStart=' ${dockersystemd} | cut -f1 -d':')

# New value of the ExecStart
newexecstart='ExecStart=/usr/bin/dockerd -H fd:// -H=tcp://0.0.0.0:2375 --containerd=/run/containerd/containerd.sock'

# Backup systemd file
cp -p ${dockersystemd} /tmp/docker.service.$(date '+%Y-%m-%d_%H%M%S').bak

# Update ExecStart with the new one
sed -i "${execstartline}s@.*@${newexecstart}@" ${dockersystemd}

# Reload and restart docker service
systemctl daemon-reload
systemctl restart docker