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2.prerequisites.md

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Prerequisites

Note that below commands are executed in Ubuntu 18.04 for examples.

Ready to install docker

Update apt package index and install packages to use the repository via HTTPs:

$ sudo apt-get update
$ sudo apt-get install -y ca-certificates curl software-properties-common apt-transport-https gnupg lsb-release

Register 'Official GPG Key' of docker, and set up the stable repository:

$ sudo mkdir -p /etc/apt/keyrings
$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
$ echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

Docker

Install docker engine with the latest version:

$ sudo apt-get update # Essential to install 'docker-ce'
$ sudo apt-get install docker-ce docker-ce-cli containerd.io docker-compose-plugin
$ sudo chmod 666 /var/run/docker.sock # If got permission denied to docker daemon socket

Docker-compose

Install docker-compose:

$ sudo curl -L "https://github.com/docker/compose/releases/download/1.24.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose # '1.24.0' can be replaced with a specific version
$ docker-compose version

Now check that docker with compose is available:

$ docker ps
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES

$ docker-compose --version
docker-compose version 1.17.1, build unknown