How to start docker service in linux

1. Docker installation

Recommended: docker tutorial

Check your current kernel version through the uname -r command

uname -r

Log in to Centos with root permissions. Make sure the yum package is updated to the latest.

yum update

Uninstall the old version (if the old version has been installed)

sudo yum remove docker  docker-common docker-selinux docker-engine

Install the required software packages, yum-util provides the yum-config-manager function, and the other two are dependent on the devicemapper driver

sudo yum install -y yum-utils device-mapper-persistent-data lvm2

Set yum source

sudo yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

You can view all docker versions in all warehouses and select a specific version to install

yum list docker-ce --showduplicates | sort -r

Install Docker

sudo yum install <FQPN>  # 例如：sudo yum install docker-ce-18.03.1.ce

Start and join the boot startup

sudo systemctl start docker
sudo systemctl enable docker

Recommended learning: Linux video tutorial

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