Install Docker on ubuntu18.04

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Docker

Three core concepts of Docker: image, container, warehouse

**Image: Similar to the image of a virtual machine, it is an installation file in the common saying. ****Container: Similar to a lightweight sandbox, a container creates an application running instance from an image, which can be started, started, stopped, and deleted, and these containers are isolated from each other and invisible to each other. **** Warehouse: Similar to a code warehouse, it is a place where Docker centrally stores image files. **

Start installing Docker

Before installing Docker Engine-Community on the new host for the first time, you need to set up the Docker repository.

Set up warehouse

$ sudo apt-get remove docker docker-engine docker.io containerd runc

$ sudo apt-get update
$ sudo apt-get install \
 apt-transport-https \
 ca-certificates \
 curl \
 gnupg-agent \
 software-properties-common

Add Docker's official GPG key:

$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
$ sudo apt-key fingerprint 0EBFCD88

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Set up the warehouse:

$ sudo add-apt-repository \
 " deb [arch=amd64] https://download.docker.com/linux/ubuntu \
 $(lsb_release -cs) \
 stable"

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Install Docker Engine-Community

After setting up the warehouse, you can install Docker Engine-Community

$ sudo apt-get update`
$ sudo apt-get install docker-ce docker-ce-cli containerd.io

It will take a while, wait patiently.

test##

After the installation is complete, verify whether the installation is successful:

$ sudo docker run hello-world

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Installation method using script (not verified)

There is a simpler installation method is to use the script provided by the official website:

$ curl -fsSL https://get.docker.com -o get-docker.sh
$ sudo sh get-docker.sh

If you want to use Docker as a non-root user, you should consider adding users to the docker group in a way similar to the following:

$ sudo usermod -aG docker your-user

reference##

Ubuntu Docker installation[Install Docker on linux (very simple Installation method)) (https://links.jianshu.com/go?to=https%3A%2F%2Fblog.csdn.net%2Fqq_41723615%2Farticle%2Fdetails%2F93386194)