1. Download the repo of docker-ce
curl https://download.docker.com/linux/centos/docker-ce.repo -o /etc/yum.repos.d/docker-ce.repo
If it prompts curl: command not found, the reason is that Curl is not installed on your VPS, install Curl
yum update -y && yum install curl -y
2. Installation dependencies
yum install https://download.docker.com/linux/fedora/30/x86_64/stable/Packages/containerd.io-1.2.6-3.3.fc30.x86_64.rpm
3. Install docker-ce
yum install docker-ce
4. Set up auto start
systemctl enable docker
5. Start docker
systemctl start docker
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