This tutorial use Ubuntu/Debian base systems. If you use another system, you can adapt.

First open your terminal and run

sudo apt update && apt install docker.io

Now, docker is installed on your machine.

To enable and start docker services, run

sudo systemctl start docker && sudo systemctl enable docker

If you want to stop the docker,

sudo systemctl stop docker && sudo service docker stop

Now we're going to install Postgres docker image, for this, run the follow command on terminal:

sudo docker run --name container_name -e POSTGRES_PASSWORD=badatabse_password -p 5432:5432 -d postgres

Note, if you already installed Postgres database in your system, the port 5432 is already booked, then you can change to another number port for example,

5434:5432

If everything goes well, docker is running in your machine.

Helpful commands

Show all docker containers running:

sudo docker ps

Show all docker containers:

sudo docker ps -a

Start docker container by name:

sudo docker start container_name

Stop docker container by name:

sudo docker stop container_name

That`s all folks!