How to install Docker Compose on ubuntu 18.04

1)

sudo curl -L https://github.com/docker/compose/releases/download/1.21.2/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose

2)

sudo chmod +x /usr/local/bin/docker-compose

3)

docker-compose --version

4)

mkdir dctest

cd dctest

vim docker-compose.yml

my-test:
 image: hello-world

5)

docker-compose up