Executed below instructions:
- download newest version (one line command!)
sudo curl -L https://github.com/docker/compose/releases/download/1.21.0/docker-compose-$(uname -s)-$(uname -m) -o /usr/local/bin/docker-compose
- change permissions for docker-compose:
sudo chmod +x /usr/local/bin/docker-compose
- check if everything is working:
docker-compose --version